WO2021117873A1 - Insert, cutting tool, and method for cutting workpiece using said cutting tool - Google Patents

Insert, cutting tool, and method for cutting workpiece using said cutting tool Download PDF

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Publication number
WO2021117873A1
WO2021117873A1 PCT/JP2020/046299 JP2020046299W WO2021117873A1 WO 2021117873 A1 WO2021117873 A1 WO 2021117873A1 JP 2020046299 W JP2020046299 W JP 2020046299W WO 2021117873 A1 WO2021117873 A1 WO 2021117873A1
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WO
WIPO (PCT)
Prior art keywords
region
cutting
rake face
insert
work material
Prior art date
Application number
PCT/JP2020/046299
Other languages
French (fr)
Japanese (ja)
Inventor
義仁 池田
Original Assignee
京セラ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京セラ株式会社 filed Critical 京セラ株式会社
Priority to JP2021564062A priority Critical patent/JP7370392B2/en
Publication of WO2021117873A1 publication Critical patent/WO2021117873A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/22—Cutting tools with chip-breaking equipment

Definitions

  • This disclosure relates to an insert, a cutting tool, and a work material cutting method using the same cutting tool.
  • a cutting tool that cuts a work material has, for example, an insert in which the cutting edge faces outward. Upon contact of the inserts, the work material is cut to the desired size and shape.
  • Patent Document 1 the cutting tool described in International Publication No. 2005/06817 (Patent Document 1) is known.
  • a cutting insert includes an upper surface, a lower surface located on the opposite side of the upper surface, a side surface connecting the upper surface and the lower surface, and a cutting edge located at a boundary between the side surface and the upper surface.
  • the upper surface is located at a boundary with the side surface, and is connected to a corner portion having a convex curved shape bulging outward in a plan view and the corner portion, and constitutes the cutting edge together with the corner portion.
  • a rake face extending along the side portion, the side portion and the corner portion, and downward toward the side portion and the corner portion, and a rising surface separated from the cutting edge via the rake surface. And have.
  • the rake face has a first rake face along the corner portion and a second rake face along the side portion.
  • the rising surface includes a first region located on a straight line that bisects the corner portion and a second region connected to the first region and at least partially along the second rake face. Have.
  • the width of the second rake face becomes smaller as the distance from the first rake face increases in a plan view.
  • the first region and the second region each have an inclination angle that goes upward as the distance from the rake face increases.
  • the tilt angle of the first region is larger than the tilt angle of the second region.
  • the cutting tool includes a holder extending from the first end toward the second end, and the cutting insert fixed to the first end side.
  • a method of cutting a work material includes a step of rotating the work material and a step of bringing the cutting tool into contact with the rotating work material and cutting the work material. It has a step of separating the cutting tool from the cut work material.
  • FIG. 5A is a sectional view taken along line VA-VA of FIG. 4 including the main body portion of FIG. 3, and FIG. 5B including the main body portion of FIG. 3 is a sectional view taken along line VB-VB of FIG. Is a sectional view taken along line VC-VC of FIG. 4 including the main body of FIG. 3, and FIG. 5D is an enlarged view of VD of FIG. 5C.
  • FIG. 5A is a sectional view taken along line VA-VA of FIG. 4 including the main body portion of FIG. 3
  • FIG. 5B including the main body portion of FIG. 3 is a sectional view taken along line VB-VB of FIG. Is a sectional view taken along line VC-VC of FIG. 4 including the main body of FIG. 3
  • FIG. 5D is an enlarged view of VD of FIG. 5C.
  • FIG. 6 is a diagram showing the relationship between the rake face and the first rising surface shown in FIG. 4 in a plan view. It is a figure explaining the method of cutting a work material using the cutting tool shown in FIG.
  • FIG. 8A is a diagram in which the work material is cut with a small cut
  • FIG. 8B is a diagram in which the work material is cut with a depth of cut larger than that in FIG. 8A
  • FIG. 8C is a diagram from FIG. 8B.
  • each direction of front, back, left, right, up and down mentioned above is used in relation to the attached drawing, and is not limited to front, back, left, right, up and down in the real space. That is, each of the above directions has no intention of being limited to a predetermined direction in the real space.
  • the work material Ob wood, metal, etc.
  • the cutting tool 10 may be fixed to the machine tool Mt.
  • the work material Ob may be rotatable via the machine tool Mt, and the cutting tool 10 may be movable back and forth, left, right, up and down via the machine tool Mt.
  • a cutting insert 11 (hereinafter, referred to as an insert) capable of cutting the work material Ob may be located at the tip of the cutting tool 10. For example, when the insert 11 is pressed against the rotating work material Ob, the work material Ob is cut into a desired size and shape.
  • the cutting tool 10 is detachably attached to the machine tool Mt (cutting tool stand).
  • the cutting tool 10 includes an outer diameter cutting tool for cutting the outer diameter of the work material Ob, an inner diameter cutting tool for cutting the inner diameter of the work material Ob, a grooving tool for grooving the work material Ob, a thread cutting tool, and the like. Examples include parting tools.
  • the cutting tool 10 can also be called a cutting tool.
  • the cutting tool 10 may have an insert 11, a holder 70 that supports the insert 11, and a clamp 13 that urges the insert 11 toward the holder 70.
  • the insert 11 may be fixed to the tip 70a of the holder 70 (hereinafter, also referred to as the first end 70a).
  • the first end 70a the tip 70a of the holder 70
  • each element constituting the cutting tool 10 will be described.
  • attention will be paid to the insert 11 in a state of being removed from the holder 70, and this will be described.
  • attention will be paid to the holder 70 in the state where the insert 11 is attached, and this will be described.
  • the explanation of the clamp 13 will be given in the explanation of the insert 11 and the holder 70.
  • the insert 11 may be a replaceable insert called a throw-away insert.
  • the insert 11 may be located in the pocket 72a lacking the tip 70a side of the holder 70 and may be fixed by the clamp 13.
  • the shape of the insert 11 is arbitrary.
  • the shape of the insert 11 may be set according to the material and shape of the work material Ob (see FIG. 1). As shown in FIG. 2, the insert 11 may have a square plate shape. In other embodiments, the insert 11 may have a triangular or pentagonal shape.
  • the insert 11 may have a shape that is parallel in the vertical direction and symmetrical with respect to the surface including the VA-VA line (FIG. 4) (illustrated example), or may have an asymmetric shape.
  • the size of the insert 11 is arbitrary.
  • the thickness (length in the vertical direction) of the insert 11 may be 5 mm or more and / or 20 mm or less.
  • the width (length in the left-right direction) of the insert 11 may be 10 mm or more and / or 20 mm or less.
  • the material of the insert 11 is arbitrary.
  • the material of the insert 11 may be PCD (polycrystalline diamond), CBN (cubic boron nitride), cemented carbide and the like.
  • CBN is, for example, a sintered composite material in which ceramic and metal are composited.
  • Specific examples of CBN include, for example, a titanium compound containing TiC and / or TiN as a main component.
  • the cemented carbide may be, for example, WC-Co, WC-TiC-Co and WC-TiC-TaC-Co.
  • WC, TiC and TaC are hard particles.
  • Co is a binding phase.
  • the insert 11 may be composed of one kind of material or may be composed of a plurality of materials.
  • the insert 11 containing a plurality of materials may be, for example, partially composed of CBN and the rest composed of cemented carbide.
  • the ratio of the CBN to the cemented carbide may be 1% or less, 3% or less, 7% or less, or 7% or more.
  • the insert 11 may be composed of CBN only at the tip pressed against the work material Ob (see FIG. 1), for example. That is, the ratio of CBN may be smaller than the ratio of cemented carbide. This makes it possible to reduce the amount of CBN, which is more expensive than cemented carbide. As a result, an inexpensive insert 11 can be provided.
  • the ratio of PCD and cemented carbide the explanation of the ratio of CBN and cemented carbide can be incorporated.
  • the insert 11 may have a main body portion 30 and a cutting portion 40.
  • the main body 30 may occupy most of the insert 11.
  • the above-mentioned description of the shape and size of the insert 11 may be incorporated for the shape and size of the main body portion 30.
  • the main body 30 may be urged toward the holder 70 by the clamp 13.
  • the cutting portion 40 is a portion capable of cutting the work material Ob (see FIG. 1).
  • the cutting portion 40 may be located, for example, at a corner of the main body portion 30 which has a polygonal shape (rectangular shape in FIG. 3) in a plan view.
  • the cutting portion 40 has a blade portion 41 facing outward.
  • the blade portion 41 of the cutting portion 40 comes into contact with the work material Ob in a state where the insert 11 is fixed to the holder 70 (see FIG. 2), and this can be cut.
  • the blade portion 41 is composed of a cutting blade 41a, a rake surface 53, and a flank surface 43a, which will be described later.
  • the material of the cutting portion 40 may be the same as the material of the main body portion 30, or may be different from the material of the main body portion 30.
  • the cutting portion 40 may be made of CBN and the main body 30 may be made of cemented carbide.
  • the cutting portion 40 may be made of PCD and the main body 30 may be made of cemented carbide.
  • the cutting portion 40 and the main body portion 30 may be made of cemented carbide.
  • the combination of the main body portion 30 and the cutting portion 40 depending on the material is arbitrary.
  • the color of the cutting portion 40 may be the same as the color of the main body portion 30, or may be different from the color of the main body portion 30.
  • FIG. 3 shows an insert 11 having only one cutting portion 40.
  • the insert 11 may have two cutting portions 40, or may have three or more cutting portions 40.
  • the insert 11 has a rectangular plate shape and may have cutting portions (a total of four cutting portions) at each of the four corners.
  • the insert 11 has a triangular plate shape and may have cutting portions (a total of three cutting portions) at each of the three corners.
  • the insert 11 has a pentagonal plate shape and may have five cuttings (a total of five cuttings) at each of the five corners.
  • the insert 11 may have an upper surface 21, a lower surface 22, and a side surface 23. Further, the insert 11 may be provided with through holes 11a that open in the upper surface 21 and the lower surface 22. The upper surface 21 and the side surface 23 form the blade portion 41 of the insert 11. The blade portion 41 comes into contact with the work material Ob (see FIG. 1), and this is cut.
  • the upper surface 21 may be a surface facing above the main body portion 30 and the cutting portion 40.
  • the upper surface 21 may be a surface with which the clamp 13 abuts while the insert 11 is fixed to the holder 70.
  • the upper surface 21 may have, for example, a rectangular shape (including a rhombus), a triangular shape, or a pentagonal shape.
  • the upper surface 21 may or may not be parallel to the lower surface 22.
  • the upper surface 21 may have irregularities at least in part.
  • the upper surface 21 may have an upper surface 31 of the main body portion and an upper surface 50 of the cutting portion.
  • the upper surface 31 of the main body is a surface formed by the main body 30 and faces upward.
  • the upper surface 50 of the cutting portion is a surface constituting the cutting portion 40 and faces upward.
  • the upper surface 31 of the main body may be a smooth surface as a whole, or may have irregularities in places.
  • the ratio of the upper surface 50 of the cutting portion to the upper surface 21 may be 3% or less, 7% or less, 15% or less, or 15% or more.
  • the shape of the upper surface 50 of the cutting portion is arbitrary.
  • the upper surface 50 of the cutting portion may have a triangular shape, a rectangular shape, or a substantially V shape (including a U shape).
  • the upper surface 50 of the cutting portion includes a corner portion 51 located at a corner of the upper surface portion 50 of the cutting portion, side portions 52 and 52 connected to the corner portion 51, and a rake surface extending along the corner portions 51 and the side portions 52 and 52. 53, a connecting surface 54 connected to the rake face 53, a rising surface 60 connected to the connecting surface 54 and facing upward as the distance from the rake surface 53 increases, and the rising surface 60 and the upper surface 31 of the main body (see FIG. 3). It may have a connecting surface 55 to be connected.
  • the corner portion 51 may be located at the boundary with the side surface 23 on the upper surface 50 of the cutting portion.
  • the corner portion 51 may exhibit a convex curved shape that bulges outward in a plan view.
  • the corner portion 51 having a convex curved shape may be inclined upward, horizontally extended, or inclined downward in the direction from the apex of the convex portion toward the side portions 52, 52. May be good.
  • the convex curve shape described above is not limited to a convex curve having no thickness, and may have a predetermined thickness.
  • the curvature of the corner portion 51 exhibiting a convex curve shape is arbitrary.
  • the side portions 52 and 52 are connected to the corner portions 51, respectively, and may extend from the corner portions 51 along the outer edge of the upper surface 50 of the cutting portion.
  • the ends of the side portions 52, 52 separated from the corner portions 51 may be connected to the rising surface 60 (second rising surface 62).
  • One side portion 52 is located on the right side of the corner portion 51 when the corner portion 51 is viewed from the front.
  • the other side portion 52 is located on the left side of the corner portion 51 when viewed from the same direction.
  • One side portion 52 and the other side portion 52 are separated from each other.
  • the sides 52 and 52 may have a linear shape.
  • the linear shape may be linear.
  • a straight line does not have to mean an exact straight line. For example, assuming a straight line along the side portion 52, if the deviation between the side portion 52 and the straight line is 0.05 mm or less or 0.03 mm or less, the side portion 52 may be regarded as a straight line. ..
  • the meaning of the straight line used in other explanations may be the same.
  • the linear shape is not limited to a straight line having no thickness, and may include having a predetermined thickness and extending in a straight line.
  • the side portions 52, 52 may be inclined upward from the corner portion 51, may extend horizontally from the corner portion 51, or may be inclined downward from the corner portion 51.
  • one side portion 52 may have the same inclination angle or may have a different inclination angle in relation to the other side portion 52.
  • one side 52 may have an upward tilt angle and the other side 52 may have a downward tilt angle.
  • the lengths of the sides 52 and 52 are arbitrary.
  • the side portions 52 and 52 may have the same length or different lengths from each other.
  • the side portions 52 and 52 may be longer than the corner portion 51 or shorter than the corner portion 51, respectively.
  • the side portions 52 and 52 may have the same length as the corner portions 51, respectively.
  • the corner portion 51 and the side portions 52, 52 may form a cutting edge 41a that directly contributes to the cutting of the work material Ob (see FIG. 1).
  • the cutting blade 41a is a part of the blade portion 41.
  • the cutting edge 41a is a portion of the insert 11 that bites into the work material Ob when cutting the work material Ob.
  • the cutting edge 41a may be a ridge line located between the upper surface 50 and the side surface 23 of the cutting portion.
  • the rake face 53 may be connected to the side portions 52, 52 and the corner portion 51. In other words, the rake face 53 may be connected to the cutting edge 41a.
  • the rake face 53 along the side portions 52, 52 and the corner portion 51 may be inclined downward (lower surface 22) from the side portions 52, 52 and the corner portion 51.
  • the inclination angle of the rake face 53 is arbitrary.
  • the inclination angle of the rake face 53 may be 10 degrees or less, 25 degrees or less, or 25 degrees or more.
  • the inclination angle of the rake face 53 may be different at each portion of the rake face 53 along the corner portion 51 and the side portions 52, 52.
  • the shape of the rake face 53 in a plan view is arbitrary.
  • the rake face 53 may have a substantially V-shape (including a substantially U-shape) in a plan view.
  • the rake face 53 may have a first rake face 53a along the corner portion 51 and second rake faces 53b and 53b connected to the first rake face 53a and along the side portions 52 and 52.
  • the first rake face 53a may be curved while having a width of a predetermined size in a plan view.
  • the width (length in the direction orthogonal to the corner portion 51) of the first rake face 53a may be constant (may not be constant) along the corner portion 51 in a plan view.
  • W1 W2
  • the constant mentioned above may be such that the width does not change by 0.03 mm or more when the first rake face is traced along the outer edge of the corner portion 51, for example.
  • the width of the first rake face 53a may be, for example, 0.05 mm or more and 0.3 mm or less.
  • the second rake face 53b, 53b may have a width of a predetermined size.
  • the width of the second rake face 53b (the length in the direction orthogonal to the side portions 52, 52 in the plan view) may be smaller as the distance from the first rake face 53a is increased in the plan view. That is, when the width of the predetermined portion on the second rake face 53b, 53b is W3 and the width of the portion away from the first rake surface 53a is W4, W3> W4 may be satisfied.
  • the width of the second rake face 53b in the vicinity of the first rake face 53a is twice or more, four times or more, or eight times the width of the portion of the second rake face 53b that is farthest from the first rake face 53a. It may be more than 1 time, or more than 1 time and less than 2 times.
  • the lengths of the second rake faces 53b and 53b may be the same as each other or may be different from each other. Further, the lengths of the second rake face 53b and 53b may be the same or different with respect to the length of the first rake face 53a (direction along the corner portion 51).
  • the connecting surface 54 shown in FIG. 4 connects the rake surface 53 and the rising surface 60.
  • the connecting surface 54 is connected to the lower side of the rake face 53 and the lower side of the rising surface 60.
  • the connecting surface 54 may have a width of a predetermined size in the direction from the rake surface 53 to the rising surface 60 (the direction orthogonal to the linear corner portion 51 in a plan view).
  • the width of the connecting surface 54 may be the same or different along the rake face 53 and the rising surface 60.
  • the rising surface 60 may be connected to the connecting surface 54 and the connecting surface 55.
  • the rising surface 60 may be separated from the cutting edge 41a via the rake surface 53, and may be directed upward as the distance from the rake surface 53 increases.
  • the lower side of the rising surface 60 may be connected to the connecting surface 54.
  • the upper side of the rising surface 60 may be connected to the connecting surface 55.
  • These upper and lower sides may include a linearly extending portion or a curvedly extending portion in side view and / or plan view.
  • the rising surface 60 may have a first rising surface 61, a second rising surface 62, and a third rising surface 63.
  • the first rising surface 61 may be connected to the connecting surface 54 and the second rising surface 62.
  • the third rising surface 63 may be connected to the second rising surface 62 and the connecting surface 55.
  • the second rising surface 62 may be located between the first rising surface 61 and the third rising surface 63.
  • the first to third rising surfaces 61, 62, and 63 will be described.
  • the first rising surface 61 may be separated from the cutting edge 41a via the rake surface 53 and the connecting surface 54.
  • the first rising surface 61 may move upward as the distance from the cutting edge 41a increases. That is, the first rising surface 61 may have an uphill slope in the direction from the connecting surface 54 toward the second rising surface 62. Since the first rising surface 61 has an ascending slope, the insert 11 is formed with a groove formed by the rake surface 53, the connecting surface 54, and the first rising surface 61. This groove may have a flat bottom surface, for example.
  • the first rising surface 61 may have a first region 61a located on a straight line L1 that bisects the corner portion 51, and second regions 61b and 61b connected to the first region 61a.
  • the first region 61a may be connected to a portion along the corner portion 51 of the connecting surface 54. From another point of view, the first region 61a may be along the corner 51.
  • the second regions 61b and 61b may be connected to the portions along the side portions 52 and 52 of the connecting surface 54. From another point of view, the second regions 61b, 61b may be along the sides 52, 52.
  • the details of the first region 61a and the second regions 61b and 61b will be described.
  • the first region 61a may be a straight line from the connecting surface 54 to the second rising surface 62 in a cross-sectional view along the bisected straight line L1 of the corner portion 51.
  • the first region 61a may be linearly curved from the connecting surface 54 to the second rising surface 62 in cross-sectional view along the straight line L1. The curvature may be convex or concave.
  • the first region 61a may have an upward inclination angle in the direction from the connecting surface 54 to the second rising surface 62.
  • ⁇ 1 is, for example, 80 degrees or more and 90 degrees or less, 65 degrees or more and 80 degrees or less, 45 degrees or more and 65 degrees or less, or 0 degrees or more and less than 45 degrees. May be done.
  • the inclination angle ⁇ 1 may be obtained by measuring the inclination angle of the first region 61a in the cross section of the insert 11 along the straight line L1 (see FIG. 4).
  • the inclination angle ⁇ 1 is a straight line connecting the lower side and the upper side of the first region 61a in the cross section of the insert 11 along the bisector of the corner portion 51. It may be obtained by measuring the inclination angle of.
  • the method of obtaining the inclination angle of the third region 62a, which will be described later, may be the same as this.
  • the upper side of the first region 61a may be located above, below, or at the same height as the cutting edge 41a (corner portion 51).
  • the width of the first region 61a in the direction orthogonal to the corner portion 51 in a plan view may be constant.
  • the width A1 may be constant along the first region 61a.
  • the constant here may be that, for example, when the first region 61a is traced along the corner portion 51, the above width does not change by 0.05 mm or more.
  • the first region 61a may have a convex shape toward the outside (cutting edge 41a) in a plan view. Further, in a cross-sectional view along the horizontal direction, the first region 61a may have a curve that bends along the corner portion 51. This curve may appear in the whole, the central portion, or a portion distant from the central portion in the first region 61a in the vertical direction. However, in the cross-sectional view along the horizontal direction, the first region 61a may be configured not to include a curve. The size and shape of the first region 61a are arbitrary.
  • the sizes of the second regions 61b and 61b are arbitrary.
  • the surface areas of the second regions 61b and 61b may be larger, the same size, or smaller than the surface area of the first region 61a.
  • the shape of the second region 61b is arbitrary.
  • the shape of the second region 61b may be substantially triangular.
  • FIGS. 5B and 5C show a cross section of the insert 11 along a straight line L2 (see FIG. 4) orthogonal to the sides 52, 52 in a plan view.
  • the widths of the second regions 61b and 61b may become smaller as the width thereof is separated from the first region 61a. See also FIG. 5D.
  • A2> A3 may be satisfied.
  • one second region 61b may be located on the right side of the first region 61a. Seen in the same direction, the other second region 61b may be located to the left of the first region 61a.
  • One second region 61b may be the same size as the other second region 61b, or may be different in size from the other second region 61b.
  • the second regions 61b, 61b may extend linearly from the connecting surface 54 toward the second rising surface 62 in a cross-sectional view along the straight line L2.
  • the second regions 61b, 61b may extend curvedly from the connecting surface 54 toward the second rising surface 62.
  • the curve may be convex or concave with respect to the outside.
  • the second regions 61b and 61b may have an upward inclination angle in the direction from the connecting surface 54 toward the second rising surface 62.
  • the inclination angles of the second regions 61b and 61b are ⁇ 2 and ⁇ 2 (in FIGS. 5B to 5D, only the inclination angle ⁇ 2 of one of the second regions 61b is shown)
  • the inclination angles ⁇ 2 and ⁇ 2. May be, for example, 60 degrees or more and 90 degrees or less, 35 degrees or more and 60 degrees or less, or more than 0 degrees and less than 45 degrees.
  • the inclination angles ⁇ 2 and ⁇ 2 of the second regions 61b and 61b are smaller than the inclination angles ⁇ 1 (see FIG. 5A) of the first region 61a.
  • the inclination angles ⁇ 2 and ⁇ 2 of the second regions 61b and 61b may be obtained by measuring the inclination angle of the cross section along the straight line L2.
  • it may be obtained by measuring, for example, the inclination angles ⁇ 2 and ⁇ 2 of a straight line connecting the lower side and the upper side of the second regions 61b and 61b.
  • the method of obtaining the inclination angles ⁇ 4 and ⁇ 4 of the fourth regions 62b and 62b, which will be described later, may be the same as this.
  • the upper sides of the second regions 61b, 61b may be located above, below, or at the same height as the cutting edge 41a (sides 52, 52). May be good.
  • the upper sides of the second regions 61b and 61b may have at least a portion located below the cutting edge 41a.
  • the upper sides of the second regions 61b and 61b may be inclined downward and extend in a direction away from the first region 61a. From another point of view, the width of the second region 61b may decrease in the direction away from the first region 61a. At this time, on the upper sides of the second regions 61b and 61b, the portion located near the first region 61a may be located above the cutting edge 41a, and the portion farthest from the first region 61a is below the cutting blade 41a. May be located in.
  • the portion of the second region 61b located in the vicinity of the first region 61a may be along the corner portion 51 (first rake face 53a). It can be said that the second regions 61b and 61b may have a portion along the corner portion 51.
  • the second rising surface 62 may be directed upward as the distance from the cutting edge 41a (rake surface 53) increases. That is, the second rising surface 62 may have an ascending slope in the direction from the first rising surface 61 to the third rising surface 63.
  • the second rising surface 62 may have a third region 62a, a fourth region 62b, 62b, and a fifth region 62c, 62c.
  • the third region 62a and the fourth regions 62b, 62b may be connected to the first rising surface 61.
  • the fifth regions 62c and 62c may be connected to the fourth regions 62b and 62b, respectively.
  • the third region 62a may be along the corner portion 51.
  • the lower side of the third region 62a may be connected to the first region 61a, and the upper side may be connected to the third rising surface 63.
  • the size of the third region 62a is arbitrary.
  • the surface area of the third region 62a may be larger, the same size, or smaller than the surface area of the first region 61a.
  • the third region 62a may extend in a straight line from the first region 61a toward the third rising surface 63 in a cross-sectional view along a straight line L1 that bisects the corner portion 51.
  • the third region 62a may extend curvedly from the first region 61a toward the third rising surface 63 in a cross-sectional view along the straight line L1. See also FIG. 5A.
  • the third region 62a which is curved in this way, may have a convex shape toward the outside (obliquely upward), for example, in a cross-sectional view along the straight line L1 (may have a concave shape).
  • the third region 62a has an upward inclination angle in the direction from the first region 61a toward the connecting surface 55.
  • the inclination angle of the third region 62a is ⁇ 3
  • the inclination angle ⁇ 3 may be, for example, 45 degrees or more and 90 degrees or less, 25 degrees or more and 90 degrees or less, or more than 0 degrees and less than 25 degrees.
  • the tilt angle ⁇ 3 may be smaller than, for example, the tilt angle ⁇ 1 of the first region 61a.
  • the shape of the third region 62a is arbitrary.
  • the third region 62a may have a substantially rectangular shape or a trapezoidal shape as a whole.
  • the fourth regions 62b, 62b may extend along the sides 52, 52. As shown in FIG. 4, in the fourth regions 62b and 62b, the lower side may be connected to the second regions 61b and 61b, and the upper side may be connected to the third rising surface 63.
  • the size and shape of the fourth regions 62b and 62b are arbitrary.
  • the surface area of the fourth regions 62b, 62b may be larger, the same size, or smaller than the surface area of the second regions 61b, 61b.
  • the shapes of the fourth regions 62b and 62b may be, for example, a rectangular shape or a trapezoidal shape.
  • the fourth regions 62b and 62b may extend straight from the second regions 61b and 61b toward the third rising surface 63, or may extend in a curved manner.
  • the curvature may be convex or concave with respect to the outside.
  • the inclination angles ⁇ 4 and ⁇ 4 are, for example, 45 degrees or more. It may be 90 degrees or less, 25 degrees or more and 90 degrees or less, or more than 0 degrees and less than 25 degrees.
  • the tilt angles ⁇ 4 and ⁇ 4 may be smaller than the tilt angles ⁇ 2 and ⁇ 2 of the second regions 61b and 61b.
  • the tilt angles ⁇ 3 may be larger, smaller, or the same as those of the tilt angles ⁇ 4 and ⁇ 4. You may.
  • the fifth regions 62c and 62c may extend from the fourth regions 62b and 62b to the outer edge of the upper surface 50 of the cutting portion, respectively.
  • the size and shape of the fifth regions 62c and 62c are arbitrary.
  • the surface area of the fifth regions 62c, 62c may be larger than the surface area of the second regions 61b, 61b.
  • the surface areas of the fifth regions 62c and 62c may be larger, smaller, or the same as the surface areas of the fourth regions 62b and 62b.
  • the shapes of the fifth regions 62c and 62c may be, for example, a rectangular shape or a trapezoidal shape.
  • the fifth regions 62c and 62c may be inclined upward in the direction from the rake surface 53 to the third rising surface 63.
  • the fifth regions 62c and 62c that are inclined in this way may be linear or curved from the rake face 53 toward the third rising surface 63.
  • the curved shape may be concave or convex with respect to the outside.
  • the third rising surface 63 may move upward as the distance from the cutting edge 41a increases. That is, the third rising surface 63 may have an upward slope in the direction from the second rising surface 61 toward the upper surface 31 of the main body.
  • the third rising surface 63 may have a sixth region 63a, a seventh region 63b, 63b, and an eighth region 63c, 63c.
  • the sixth region 63a may be connected to a portion (third region 62a) along the corner portion 51 of the second rising surface 62.
  • the seventh regions 63b and 63b may be connected to the portions (fourth regions 62b and 62b) along the side portions 52 and 52 of the second rising surface 62.
  • the eighth regions 63c and 63c are connected to the seventh regions 63b and 63b, respectively, and extend from the seventh regions 63b and 63b to the outer edge of the insert 11.
  • the sixth region 63a may be along the corner portion 51.
  • the description of the size and shape of the sixth region 63a the description of the size and shape of the third region 62a may be incorporated.
  • the sixth region 63a may be along the corner portion 51. As shown in FIG. 4, in the sixth region 63a, the lower side may be connected to the third region 62a and the upper side may be connected to the connecting surface 55. As for the description of the size and shape of the sixth region 63a, the description of the size and shape of the third region 62a may be incorporated.
  • the sixth region 63a may or may not be a curved surface.
  • the inclination angle of the sixth region 63a is ⁇ 6
  • the inclination angle ⁇ 6 may be smaller or larger than, for example, the inclination angle ⁇ 3 of the third region 62a.
  • the seventh regions 63b and 63b may be along the sides 52 and 52. As shown in FIG. 4, in the seventh region 63b, 63b, the lower side may be connected to the fourth region 62b, 62b, and the upper side may be connected to the connection surface 55. As for the description of the size and shape of the seventh regions 63b and 63b, the description of the size and shape of the fourth regions 62b and 62b may be incorporated.
  • the seventh regions 63b and 63b may or may not be curved surfaces. Assuming that the inclination angles of the seventh region 63b are ⁇ 7 (only the inclination angle ⁇ 7 of one of the seventh regions 63b is shown in FIGS. 5B and 5C), the inclination angles ⁇ 7 and ⁇ 7 are, for example, the fourth. It may be smaller, larger, or the same as the inclination angles ⁇ 4 and ⁇ 4 of the regions 62b and 62b.
  • the eighth regions 63c and 63c connect the fifth regions 62c and 62c with the connecting surface 55.
  • the description of the size and shape of the eighth regions 63c and 63c the description of the size and shape of the fifth regions 62c and 62c may be incorporated.
  • the eighth regions 63c and 63c may or may not be curved surfaces. Assuming that the inclination angles of the eighth regions 63c and 63c are ⁇ 8 (not shown in the figure), the inclination angles ⁇ 8 and ⁇ 8 are compared with the inclination angles ⁇ 5 and ⁇ 5 of the fifth regions 62c and 62c. It may be large, small, or the same.
  • the first region 61a, the third region 62a, and the sixth region 63a have portions located on a straight line L1 extending along the bisector of the corner portion 51 in a plan view.
  • the second regions 61b and 61b, the fourth regions 62b and 62b and the seventh regions 63b and 63b have portions located on the straight line L2 orthogonal to the side portions 52 and 52 in a plan view.
  • the upper side and the lower side of the first region 61a, the third region 62a, and the sixth region 63a may be curved, for example.
  • the upper and lower sides of the second region 61b, 61b, the fourth to fifth regions 62b, 62b, 62c, 62c and the seventh to eighth regions 63b, 63b, 63c, 63c may be linear, for example.
  • the connecting surface 55 may be the surface located at the uppermost position among the surfaces constituting the upper surface 50 of the cutting portion.
  • the lower surface 22 of the insert 11 is located on the opposite side of the upper surface 21.
  • the lower surface 22 is a surface facing the holder 70 side when the insert 11 is fixed to the holder 70 (see FIG. 2).
  • the insert 11 may be fixed with the lower surface 22 in contact with the holder 70.
  • the description of the shape of the lower surface 22 the description of the shape of the upper surface 21 may be incorporated.
  • the distance D1 is constant along the lower side of the first region 61a. May be.
  • the constant here may be that, for example, when the distance from the first region 61a to the lower surface 22 is measured along the lower side of the first region 61a, the above distance does not change by 0.05 mm or more.
  • the lower edge of the first region 61a may extend along the horizontal direction.
  • the distance from the lower side (lower edge) of the second regions 61b and 61b to the lower surface 22 (see FIG. 3) in the vertical direction may be longer as the distance from the first region 61a increases.
  • the distance from the second regions 61b and 61b to the lower surface 22 in the vicinity of the first region 61a is defined as D2.
  • the distance from the second regions 61b and 61b to the lower surface 22 at a location away from the first region 61a is defined as D3.
  • the relationship between the two may be D2 ⁇ D3.
  • the lower sides (lower edges) of the second regions 61b and 61b may be inclined upward in the direction away from the first region 61a.
  • the lower sides of the second regions 61b and 61b may have an upslope in the direction away from the first region 61a.
  • the inclination angles of the lower sides of the second regions 61b and 61b may be, for example, 3 degrees or less, 10 degrees or less, 20 degrees or less, or 20 degrees or more.
  • the lower sides of the second regions 61b and 61b form a boundary between the second regions 61b and 61b and the connecting surface 54.
  • the side surface 23 is located between the upper surface 21 and the lower surface 22.
  • the side surface 23 may be a surface connecting the upper surface 21 and the lower surface 22.
  • the side surface 23 may be bulged toward the outside, may be recessed toward the inside, or may be a surface having no curvature. Further, the side surface 23 may be a smooth surface as a whole, or may be a surface having irregularities in places.
  • the side surface 23 may have a main body portion side surface 33 and a cutting portion side surface 43.
  • the side surface 33 of the main body constitutes a part of the side surface of the main body 30.
  • the side surface 43 of the cutting portion constitutes the rest of the side surface of the cutting portion 40.
  • the side surface 43 of the cutting portion may be continuous with the side surface 33 of the main body portion.
  • the side surface 43 of the cutting portion may include a flank surface 43a constituting the blade portion 41.
  • the flank 43a is connected to the rake face 53 and intersects the rake face 53 at a predetermined angle so that the insert 11 does not come into contact with the work material Ob more than necessary.
  • the cutting edge 41a is located at the boundary between the flank surface 43a and the rake surface 53. That is, it can be said that the cutting edge 41a includes the ridgeline of the flank surface 43a and the rake surface 53.
  • the holder 70 may have, for example, a length extending from the front end 70a (first end 70a) to the rear end 70b (hereinafter, also referred to as the second end 70b). As shown in the illustrated example, the holder 70 may have a rod shape.
  • the length of the holder 70 can be set arbitrarily. For example, the length of the holder 70 may be set in the range of 50 mm or more and 200 mm or less.
  • the size of the holder 70 can be set arbitrarily.
  • the width (horizontal direction) and thickness (vertical direction) of the holder 70 may be 10 mm or more, 19 mm or more, 25 mm or more, or 50 mm or more.
  • the width and thickness of the holders 70 may be the same or different from each other.
  • the thickness of the holder 70 may increase toward the tip 70a.
  • the material of the holder 70 can be set arbitrarily.
  • the material of the holder 70 may be steel, cast iron, or the like.
  • the toughness of the holder 70 can be increased.
  • the holder 70 may have a shank portion 71 and a fixing portion 72.
  • the shank portion 71 constitutes the second end 70b side of the holder 70.
  • the shank portion 71 may be, for example, a solid inside.
  • the shape of the shank portion 71 is arbitrary. For example, in a cross section perpendicular to the direction in which the shank portion 71 extends, the shank portion 71 may have a rectangular or circular shape. As shown in FIG. 2, the shank portion 71 may have a first surface 71a, a second surface 71b, a third surface 71c, and a fourth surface 71d.
  • the first surface 71a may face the direction in which the flank 43a of the insert 11 faces.
  • the second surface 71b may be located on the opposite side of the first surface 71a.
  • the third surface 71c may connect the first surface 71a and the second surface 71b and face the direction in which the rake surface 53 faces.
  • the fourth surface 71d may connect the first surface 71a and the second surface 71b and may be located on the opposite side of the third surface 71c.
  • the first to fourth surfaces 71d may be the surface of the shank portion 71 that connects the second end 70b and the fixing portion 72.
  • the fixing portion 72 is located on the first end 70a side of the holder 70.
  • An insert 11 capable of cutting the work material Ob is fixed to the fixing portion 72.
  • the insert 11 may be fitted in the pocket 72a lacking a part of the fixing portion 72.
  • the insert 11 may be fixed by being urged downward by the clamp 13.
  • the tip of the clamp 13 for urging the insert 11 toward the holder 70 may be inserted into the through hole 11a formed in the insert 11.
  • the insert 11 may be sandwiched between the bottom surface of the pocket 72a and the clamp 13 and fixed to the holder 70.
  • the clamp 13 may be fixed by a screw screwed into the holder 70.
  • the fixing portion 72 constitutes the first end 70a side of the holder 70.
  • FIG. 7 shows each step of the work material cutting method.
  • the work material cutting method may start from, for example, a step of attaching the work material Ob to the machine tool Mt (a step of fixing the work material). After that, for example, the cutting tool 10 may be attached to the machine tool Mt (for example, the tool post) (step of fixing the tool).
  • the step of fixing the work material may be performed, for example, after the step of fixing the tool is completed.
  • the cutting tool 10 (insert 11) may be positioned (positioning step). For example, the size and / or shape of the work material Ob may be confirmed, and the positional relationship between the work material Ob and the cutting tool 10 may be confirmed. The positioning step may be performed manually (visually) or automatically.
  • the work material Ob is rotated via the machine tool Mt (rotation process). While the work material Ob is rotating, the cutting tool 10 may be brought into contact with the work material Ob via the machine tool Mt (cutting process). Specifically, the cutting portion 40 of the insert 11 may be brought into contact with the work material Ob. Then, the work material Ob is cut until it has a desired size and shape.
  • the cutting tool 10 may be separated from the work material Ob (step of releasing the cutting tool). After that, the rotation of the work material Ob is stopped (stop process), and the work material Ob is removed from the machine tool Mt (work material removal process). Thereby, the cut work material Ob can be obtained.
  • the blade portion 41 comes into contact with the work material Ob, and the work material Ob is cut by this.
  • the cut portion becomes chip Du.
  • the cutting is performed only around the corner portion 51 of the insert 11, and a small chip Du is generated from the work material Ob.
  • the cut of the insert 11 with respect to the work material Ob is large, the cutting is performed by the corner portions 51 and the side portions 52 and 52, and a large chip Du is generated from the work material Ob.
  • FIG. 8A shows a diagram in which the work material Ob is cut only at a part of the corner portion 51 of the insert 11, and as a result, chip Du having a small width is generated.
  • the chip Du having a small width generated by cutting is, for example, the boundary between the first region 61a along the corner portion 51 and the second regions 61b and 61b along the side portions 52 and 52 via the rake face 53. Proceed toward the vicinity of Bo0.
  • the inclination angle of the first region 61a is larger than the inclination angle of the second regions 61b and 61b.
  • the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a.
  • the speed of chip Du can be reduced more reliably during cutting.
  • FIG. 8B shows a diagram in which the work material Ob is cut in a wide range at the corner portion 51 of the insert 11 to generate chips Du having a small width.
  • the small-width chip Du generated by cutting advances toward the first region 61a along the corner portion 51, for example, through the rake face 53.
  • the inclination angle of the first region 61a is larger than the inclination angle of the second regions 61b and 61b.
  • the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a.
  • the speed of chip Du can be reduced more reliably during cutting.
  • FIG. 8C shows a diagram in which the work material Ob is cut around the corner portion 51 and the side portions 52, 52 of the insert 11, thereby generating chips Du having a large width.
  • the large-width chip Du generated by cutting is directed to the first region 61a along the corner portion 51 and the second regions 61b and 61b along the side portions 52 and 52, for example, via the rake face 53. Proceed.
  • the inclination angles of the second regions 61b and 61b are smaller than the inclination angles of the first regions 61a. This makes it difficult for the chip Du generated by cutting the work material Ob to come into contact with the second region 61b during cutting.
  • the chip Du toward the first region 61a and the second regions 61b, 61b can be guided to the outside of the insert 11 via the second regions 61b, 61b.
  • the decrease in the speed of the thick chip Du is reduced.
  • the chip Du generated from the work material Ob becomes smaller in width.
  • a chip Du (thin chip Du) having a small width is unstable in the traveling direction, and sometimes heads toward the work material Ob while having a predetermined speed.
  • the inclination angle ⁇ 1 of the first region 61a is larger than the inclination angles ⁇ 2 and ⁇ 2 of the second regions 61b and 61b. Since the inclination angle ⁇ 1 is larger than the inclination angles ⁇ 2 and ⁇ 2, the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a during cutting. As a result, the thin chip Du can be brought into contact with the first region 61a and its speed can be reduced.
  • the chip Du generated from the work material Ob becomes large in width.
  • a wide chip Du thin chip Du
  • the width of the second rake face 53b becomes smaller as the distance from the first rake face 53a increases in a plan view. This makes it easier for the thick chip Du to move to the second region 61b side.
  • the tilt angles ⁇ 2 and ⁇ 2 of the second region 61b are smaller than the tilt angles ⁇ 1 of the first region 61a. As a result, it is possible to reduce the possibility that the speed of the thick chip Du that has moved to the second region 61b side decreases.
  • the insert 11 of the present disclosure when the chip Du is thin, the speed is reduced, and when the chip Du is thick, the speed reduction can be reduced. That is, it is possible to reduce the risk of the chip Du heading toward the work material Ob and the risk of the chip Du staying on the insert 11. Therefore, it is possible to provide the insert 11 capable of stable cutting.
  • the width of the first rake face 53a is constant along the corner portion 51. Since the width of the first rake face 53a is constant along the corner portion 51, the chip Du generated by cutting around the first rake face 53a can stably head toward the first region 61a. That is, the thin chip Du (see FIGS. 8A and 8B) cut around the first rake face 53a can be more reliably brought into contact with the first region 61a. As a result, it is possible to provide the insert 11 capable of more stable cutting.
  • the width of the second region 61b in the direction orthogonal to the side portions 52, 52 in a plan view becomes smaller as the width becomes farther from the first region 61a.
  • the width of the chip Du increases, the possibility that the chip Du vigorously contacts the second region 61b is reduced.
  • the width of the first region 61a in the direction orthogonal to the corner portion 51 in a plan view is constant along the corner portion 51.
  • the moving direction of the thin chips Du generated by cutting and in contact with the first region 61a can be stabilized.
  • the lower edge of the second region 61b points upward as the distance from the first region 61a increases. This allows the thick chip Du to move upward along the second region 61b. As a result, the risk of thick chip Du staying on the insert 11 is reduced. Therefore, it is possible to provide the insert 11 capable of more stable cutting.
  • the second region 61b has a portion along the first rake face 53a. This facilitates the chip Du in contact with the first region 61a to move along the second region 61b. As a result, the risk of chip Du staying on the insert 11 can be reduced. Therefore, it is possible to provide the insert 11 capable of more stable cutting.
  • the cutting tool 10 has an insert 11 fixed to the first end 70a side. As a result, it is possible to provide a cutting tool 10 capable of stably cutting the work material Ob.
  • the work material cutting method in the present disclosure includes a step of bringing the cutting tool 10 into contact with the work material Ob and cutting the work material Ob. Further, the cutting tool 10 includes the insert 11. Therefore, it is possible to provide a work material cutting method capable of more stable cutting.
  • FIG. 9 shows a cross-sectional view of the insert 11A in the modified example.
  • FIG. 9 corresponds to FIG. 5A.
  • reference numerals are used and detailed description thereof will be omitted.
  • the upper surface 50A of the cutting portion may have a corner portion 51, side portions 52 and 52, a rake surface 53, and a rising surface 60A.
  • the first rising surface 61A is connected to the lower side of the rake surface 53.
  • the first rising surface 61A is inclined upward in the direction from the rake face 53 to the second rising surface 62.
  • the first region 61Aa may be connected to the lower side of the rake face 53 along the corner portion 51.
  • the groove formed by the rake face 53 and the first region 61Aa may exhibit a substantially V shape (including a substantially U shape) in a cross-sectional view that bisects the corner portion 51. Good. That is, the rising surface 60 (first rising surface 61) may be separated from the cutting edge 41a only through the rake face 53.
  • the lower edge (lower edge) of the first region 61Aa may be connected to the rake face 53. From another viewpoint, the lower side of the first region 61Aa may form a boundary between the first region 61Aa and the rake face 53. The lower edge (lower edge) of the second region 61Ab may be connected to the rake face 53. From another viewpoint, the lower side of the second region 61Ab may form a boundary between the second region 61Ab and the rake face 53.
  • inserts and cutting tools in the present disclosure are not limited to the embodiments and modifications described above.
  • the following are some examples of inserts and cutting tools with deformed shapes.
  • the rising surface is composed of the first to third rising surfaces.
  • the third rising surface may be omitted if necessary. That is, the second rising surface may be directly connected to the connecting surface.
  • the third region may be connected to a portion along the corner portion of the connecting surface, or the fourth region may be connected to a portion along the side portion of the connecting surface.
  • the illustrated cutting tool is right-handed.
  • the cutting tool in the present disclosure is not limited to right-handed cutting tools, and can also be applied to left-handed cutting tools.
  • the cutting tool in the present disclosure can be applied without permission.

Abstract

Provided is a cutting insert that has an upper face, a lateral face continued from the upper face, and a cutting blade positioned on a boundary between the upper face and the lateral face. The upper face has a corner portion positioned at a corner, an edge portion continued from the corner portion, a scoop face extending along the corner portion and the edge portion, and a rising face spaced apart from the cutting blade across the scoop face. The scoop face has a first scoop face along the corner portion, and a second scoop face along the edge portion. The rising face has a first region positioned on a line bisecting the corner portion, and a second region continued from the first region. The second scoop face has the width thereof becoming gradually reduced with increasing distance from the first scoop face in a plan view. The angle of inclination of the first region is greater than the angle of inclination of the second region.

Description

インサート、切削工具及び同切削工具を用いた被削材切削方法Work material cutting method using inserts, cutting tools and the same cutting tools
　本開示は、インサート、切削工具及び同切削工具を用いた被削材切削方法に関する。 This disclosure relates to an insert, a cutting tool, and a work material cutting method using the same cutting tool.
　例えば、木材又は金属等（以下、被削材と呼ぶ）は、工作機械に固定された状態で切削工具によって切削される。被削材を切削する切削工具は、例えば、切刃が外方に臨むインサートを有している。インサートが接触することによって、被削材は、所望の大きさ及び形状に切削される。このようなインサートを備えた切削工具として、国際公開第２００５／０６８１１７号（特許文献１）に記載の切削工具が知られている For example, wood, metal, etc. (hereinafter referred to as work material) are cut by a cutting tool while being fixed to a machine tool. A cutting tool that cuts a work material has, for example, an insert in which the cutting edge faces outward. Upon contact of the inserts, the work material is cut to the desired size and shape. As a cutting tool provided with such an insert, the cutting tool described in International Publication No. 2005/06817 (Patent Document 1) is known.
　本開示の一態様にかかる切削インサートは、上面と、前記上面の反対側に位置する下面と、前記上面及び前記下面を繋ぐ側面と、前記側面及び前記上面の境界に位置する切刃と、を有している。前記上面は、前記側面との境界に位置し、平面視において外方に向かって膨らんだ凸曲線状を呈する角部と、前記角部に繋がり、前記角部と共に前記切刃を構成している辺部と、前記辺部及び前記角部に沿って延びていると共に、前記辺部及び前記角部から離れるほど下方に向かうすくい面と、前記すくい面を介して前記切刃から離れた立ち上がり面と、を有している。前記すくい面は、前記角部に沿った第１すくい面と、前記辺部に沿った第２すくい面と、を有している。前記立ち上がり面は、前記角部を二等分する直線上に位置する第１領域と、前記第１領域に繋がり、少なくとも一部が前記前記第２すくい面に沿っている第２領域と、を有している。前記第２すくい面は、平面視において、前記第１すくい面から離れるほど幅が小さくなっている。前記第１領域及び前記第２領域は、それぞれ前記すくい面から離れるほど上方に向かう傾斜角度を有している。前記第１領域の傾斜角度は、前記第２領域の傾斜角度より大きい。 A cutting insert according to one aspect of the present disclosure includes an upper surface, a lower surface located on the opposite side of the upper surface, a side surface connecting the upper surface and the lower surface, and a cutting edge located at a boundary between the side surface and the upper surface. Have. The upper surface is located at a boundary with the side surface, and is connected to a corner portion having a convex curved shape bulging outward in a plan view and the corner portion, and constitutes the cutting edge together with the corner portion. A rake face extending along the side portion, the side portion and the corner portion, and downward toward the side portion and the corner portion, and a rising surface separated from the cutting edge via the rake surface. And have. The rake face has a first rake face along the corner portion and a second rake face along the side portion. The rising surface includes a first region located on a straight line that bisects the corner portion and a second region connected to the first region and at least partially along the second rake face. Have. The width of the second rake face becomes smaller as the distance from the first rake face increases in a plan view. The first region and the second region each have an inclination angle that goes upward as the distance from the rake face increases. The tilt angle of the first region is larger than the tilt angle of the second region.
　本開示の一態様にかかる切削工具は、第１端から第２端に向かって延びたホルダと、前記第１端側に固定された上記切削インサートと、を有する。 The cutting tool according to one aspect of the present disclosure includes a holder extending from the first end toward the second end, and the cutting insert fixed to the first end side.
　本開示の一態様にかかる被削材の切削方法は、被削材を回転させる工程と、回転している前記被削材に対し上記切削工具を接触させ、前記被削材を切削する工程と、切削された前記被削材から前記切削工具を離す工程と、を有している。 A method of cutting a work material according to one aspect of the present disclosure includes a step of rotating the work material and a step of bringing the cutting tool into contact with the rotating work material and cutting the work material. It has a step of separating the cutting tool from the cut work material.
工作機械に取り付けられた切削工具によって被削材が切削される状況を説明する図である。It is a figure explaining the situation which the work material is cut by the cutting tool attached to the machine tool. 図１に示された切削工具の斜視図である。It is a perspective view of the cutting tool shown in FIG. 図２に示されたインサートの斜視図である。It is a perspective view of the insert shown in FIG. 図３に示されたインサートの切削部の拡大図である。It is an enlarged view of the cutting part of the insert shown in FIG. 図５Ａは、図３の本体部も含めた図４のVＡ－VＡ線断面図であり、図３の本体部も含めた図５Ｂは、図４のVＢ－VＢ線断面図であり、図５Ｃは、図３の本体部も含めた図４のVＣ－VＣ線断面図であり、図５Ｄは、図５ＣのVＤ拡大図である。5A is a sectional view taken along line VA-VA of FIG. 4 including the main body portion of FIG. 3, and FIG. 5B including the main body portion of FIG. 3 is a sectional view taken along line VB-VB of FIG. Is a sectional view taken along line VC-VC of FIG. 4 including the main body of FIG. 3, and FIG. 5D is an enlarged view of VD of FIG. 5C. 図６は、図４に示されたすくい面及び第１立ち上がり面との関係を平面視において示した図である。FIG. 6 is a diagram showing the relationship between the rake face and the first rising surface shown in FIG. 4 in a plan view. 図２に示された切削工具を用いて被削材を切削する方法について説明する図である。It is a figure explaining the method of cutting a work material using the cutting tool shown in FIG. 図８Ａは、小さな切り込みで被削材を切削している図であり、図８Ｂは、図８Ａよりも大きな切り込み量で被削材を切削している図であり、図８Ｃは、図８Ｂよりも大きな切り込みで被削材を切削している図である。FIG. 8A is a diagram in which the work material is cut with a small cut, FIG. 8B is a diagram in which the work material is cut with a depth of cut larger than that in FIG. 8A, and FIG. 8C is a diagram from FIG. 8B. It is also a figure in which the work material is cut with a large notch. 変形例によるインサートを示した図である。It is a figure which showed the insert by the modification.
　本開示の実施形態を、添付図を用いて以下説明する。前後左右上下の各方向は、図２を基準として、Ｆｒは前、Ｒｒは後、Ｌｅは左、Ｒｉは右、Ｕｐは上、Ｄｎは下を示している。尚、参照する各図は模式的に示され詳細が省略されることもある。 The embodiments of the present disclosure will be described below with reference to the attached figures. In each of the front-back, left-right, up-down directions, Fr indicates the front, Rr indicates the rear, Le indicates the left, Ri indicates the right, Up indicates the top, and Dn indicates the bottom, with reference to FIG. It should be noted that each figure to be referred to is schematically shown and details may be omitted.
　更に、上記にいう前後左右上下の各方向は、添付された図面との関係で用いられ、実空間の前後左右上下に限定されない。即ち、上記各方向は、実空間の所定方向に限定される意図を有しない。 Furthermore, each direction of front, back, left, right, up and down mentioned above is used in relation to the attached drawing, and is not limited to front, back, left, right, up and down in the real space. That is, each of the above directions has no intention of being limited to a predetermined direction in the real space.
［実施形態］
　図１を参照する。例えば、工作機械Ｍｔには、被削材Ｏｂ（木材又は金属等）及び切削工具１０が固定されてよい。被削材Ｏｂは、工作機械Ｍｔを介して回転可能であってよいし、切削工具１０は、工作機械Ｍｔを介して前後左右上下に移動可能であってよい。ここで、切削工具１０の先端には、被削材Ｏｂを切削可能な切削インサート１１（以下、インサートと呼ぶ）が位置してよい。例えば、インサート１１が回転する被削材Ｏｂに押し当てられることにより、被削材Ｏｂは、所望の大きさ及び形状に切削される。 [Embodiment]
See FIG. For example, the work material Ob (wood, metal, etc.) and the cutting tool 10 may be fixed to the machine tool Mt. The work material Ob may be rotatable via the machine tool Mt, and the cutting tool 10 may be movable back and forth, left, right, up and down via the machine tool Mt. Here, a cutting insert 11 (hereinafter, referred to as an insert) capable of cutting the work material Ob may be located at the tip of the cutting tool 10. For example, when the insert 11 is pressed against the rotating work material Ob, the work material Ob is cut into a desired size and shape.
（切削工具）
　切削工具１０は、工作機械Ｍｔ（刃物台）に着脱可能に取り付けられる。切削工具１０としては、被削材Ｏｂの外径を切削する外径切削工具、被削材Ｏｂの内径を切削する内径切削工具、被削材Ｏｂに溝等を施す溝入れ工具、ねじ切り工具及び突っ切り工具等が挙げられる。切削工具１０は、バイトと呼ぶこともできる。 (Cutting tools)
The cutting tool 10 is detachably attached to the machine tool Mt (cutting tool stand). The cutting tool 10 includes an outer diameter cutting tool for cutting the outer diameter of the work material Ob, an inner diameter cutting tool for cutting the inner diameter of the work material Ob, a grooving tool for grooving the work material Ob, a thread cutting tool, and the like. Examples include parting tools. The cutting tool 10 can also be called a cutting tool.
　図２を参照する。図２に示すように、切削工具１０は、インサート１１と、このインサート１１を支持するホルダ７０と、インサート１１をホルダ７０に向かって付勢しているクランプ１３と、を有してよい。インサート１１は、ホルダ７０の先端７０ａ（以下、第１端７０ａとも呼ぶ）に固定されてよい。以下、切削工具１０を構成する各要素の説明をする。最初に、ホルダ７０から取り外された状態のインサート１１に着目し、これを説明する。次に、インサート１１が取り付けられた状態のホルダ７０に着目し、これを説明する。クランプ１３の説明については、インサート１１及びホルダ７０の説明中において行う。 Refer to Fig. 2. As shown in FIG. 2, the cutting tool 10 may have an insert 11, a holder 70 that supports the insert 11, and a clamp 13 that urges the insert 11 toward the holder 70. The insert 11 may be fixed to the tip 70a of the holder 70 (hereinafter, also referred to as the first end 70a). Hereinafter, each element constituting the cutting tool 10 will be described. First, attention will be paid to the insert 11 in a state of being removed from the holder 70, and this will be described. Next, attention will be paid to the holder 70 in the state where the insert 11 is attached, and this will be described. The explanation of the clamp 13 will be given in the explanation of the insert 11 and the holder 70.
　図２に示すように、インサート１１は、スローアウェイインサートと呼ばれる交換式のインサートであってよい。インサート１１は、ホルダ７０の先端７０ａ側を欠いたポケット７２ａ内に位置し、クランプ１３によって固定されてよい。 As shown in FIG. 2, the insert 11 may be a replaceable insert called a throw-away insert. The insert 11 may be located in the pocket 72a lacking the tip 70a side of the holder 70 and may be fixed by the clamp 13.
　インサート１１の形状は、任意である。インサート１１の形状は、被削材Ｏｂ（図１参照）の材質及び形状等に応じて設定さえてよい。図２に示すように、インサート１１は、四角板形状を呈してよい。その他の態様において、インサート１１は、三角板形状又は五角板形状を呈してもよい。インサート１１は、上下方向に平行でＶＡ－ＶＡ線（図４）を含む面に対して、対称の形状であってもよいし（図示の例）、非対称の形状であってもよい。 The shape of the insert 11 is arbitrary. The shape of the insert 11 may be set according to the material and shape of the work material Ob (see FIG. 1). As shown in FIG. 2, the insert 11 may have a square plate shape. In other embodiments, the insert 11 may have a triangular or pentagonal shape. The insert 11 may have a shape that is parallel in the vertical direction and symmetrical with respect to the surface including the VA-VA line (FIG. 4) (illustrated example), or may have an asymmetric shape.
　インサート１１の大きさは、任意である。例えば、インサート１１の厚さ（上下方向の長さ）は、５ｍｍ以上とされてよく、及び／又は２０ｍｍ以下とされてよい。例えば、インサート１１の幅（左右方向の長さ）は、１０ｍｍ以上とされてよく、及び／又は２０ｍｍ以下とされてよい。 The size of the insert 11 is arbitrary. For example, the thickness (length in the vertical direction) of the insert 11 may be 5 mm or more and / or 20 mm or less. For example, the width (length in the left-right direction) of the insert 11 may be 10 mm or more and / or 20 mm or less.
　インサート１１の材料は、任意である。例えば、インサート１１の材料は、ＰＣＤ（多結晶ダイヤモンド）、ＣＢＮ（立方晶窒化ホウ素）及び超硬合金等であってよい。ＣＢＮは、例えば、セラミックと金属とを複合させた焼結複合材料である。ＣＢＮの具体例としては、例えば、ＴｉＣ及び／又はＴｉＮを主成分としたチタン化合物等が挙げられる。超硬合金は、例えば、ＷＣ－Ｃｏ、ＷＣ－ＴｉＣ－Ｃｏ及びＷＣ－ＴｉＣ－ＴａＣ－Ｃｏであってよい。ＷＣ、ＴｉＣ及びＴａＣは、硬質粒子である。一方、Ｃｏは結合相である。 The material of the insert 11 is arbitrary. For example, the material of the insert 11 may be PCD (polycrystalline diamond), CBN (cubic boron nitride), cemented carbide and the like. CBN is, for example, a sintered composite material in which ceramic and metal are composited. Specific examples of CBN include, for example, a titanium compound containing TiC and / or TiN as a main component. The cemented carbide may be, for example, WC-Co, WC-TiC-Co and WC-TiC-TaC-Co. WC, TiC and TaC are hard particles. On the other hand, Co is a binding phase.
　インサート１１は、１種類の材料から構成されてもよいし、複数の材料から構成されてもよい。複数の材料を含むインサート１１は、例えば、一部がＣＢＮによって構成され、残部が超硬合金によって構成されてよい。ＣＢＮと超硬合金とから構成されるインサート１１は、例えば、超硬合金に対するＣＢＮの占める割合が、１％以下、３％以下、７％以下又は７％以上とされてよい。インサート１１は、例えば、被削材Ｏｂ（図１参照）に押し当てられる先端のみがＣＢＮで構成されてよい。即ち、超硬合金が占める割合に対し、ＣＢＮが占める割合が小さくてよい。これにより、超硬合金より高価なＣＢＮの量を少なくできる。結果、安価なインサート１１を提供できる。ＰＣＤと超硬合金との割合の説明については、ＣＢＮと超硬合金との割合の説明を援用できる。 The insert 11 may be composed of one kind of material or may be composed of a plurality of materials. The insert 11 containing a plurality of materials may be, for example, partially composed of CBN and the rest composed of cemented carbide. In the insert 11 composed of the CBN and the cemented carbide, for example, the ratio of the CBN to the cemented carbide may be 1% or less, 3% or less, 7% or less, or 7% or more. The insert 11 may be composed of CBN only at the tip pressed against the work material Ob (see FIG. 1), for example. That is, the ratio of CBN may be smaller than the ratio of cemented carbide. This makes it possible to reduce the amount of CBN, which is more expensive than cemented carbide. As a result, an inexpensive insert 11 can be provided. For the explanation of the ratio of PCD and cemented carbide, the explanation of the ratio of CBN and cemented carbide can be incorporated.
　図２及び図３を参照する。インサート１１は、本体部３０と、切削部４０と、を有してよい。例えば、本体部３０は、インサート１１の大部分を占めてよい。本体部３０がインサート１１の大部分を占めている場合、本体部３０の形状及び大きさについては、インサート１１の形状及び大きさの既述の説明が援用されてよい。本体部３０は、クランプ１３によってホルダ７０側に付勢されてよい。 Refer to FIGS. 2 and 3. The insert 11 may have a main body portion 30 and a cutting portion 40. For example, the main body 30 may occupy most of the insert 11. When the main body portion 30 occupies most of the insert 11, the above-mentioned description of the shape and size of the insert 11 may be incorporated for the shape and size of the main body portion 30. The main body 30 may be urged toward the holder 70 by the clamp 13.
　図３及び図４を参照する。切削部４０は、被削材Ｏｂ（図１参照）を切削可能な部位である。切削部４０は、例えば、平面視において多角形状（図３では矩形状）を呈する本体部３０の角に位置してよい。切削部４０は、外方に臨む刃部４１を有している。 Refer to FIGS. 3 and 4. The cutting portion 40 is a portion capable of cutting the work material Ob (see FIG. 1). The cutting portion 40 may be located, for example, at a corner of the main body portion 30 which has a polygonal shape (rectangular shape in FIG. 3) in a plan view. The cutting portion 40 has a blade portion 41 facing outward.
　切削部４０が有する刃部４１は、インサート１１がホルダ７０（図２参照）に固定された状態において被削材Ｏｂに接触し、これを切削可能である。刃部４１は、後述する、切刃４１ａ、すくい面５３及び逃げ面４３ａによって構成されている。 The blade portion 41 of the cutting portion 40 comes into contact with the work material Ob in a state where the insert 11 is fixed to the holder 70 (see FIG. 2), and this can be cut. The blade portion 41 is composed of a cutting blade 41a, a rake surface 53, and a flank surface 43a, which will be described later.
　図３を参照する。切削部４０の材料は、本体部３０の材料と同一であってもよいし、本体部３０の材料と異なってもよい。１つの態様では、切削部４０がＣＢＮにより構成され、本体部３０が超硬合金により構成されてよい。他の１つの態様では、切削部４０がＰＣＤにより構成され、本体部３０が超硬合金により構成されてもよい。更に他の１つの態様では、切削部４０及び本体部３０は、超硬合金により構成されてよい。本体部３０及び切削部４０の材料による組み合わせは、任意である。尚、切削部４０の色は、本体部３０の色と同一であってもよいし、本体部３０の色と異なってもよい。 Refer to FIG. The material of the cutting portion 40 may be the same as the material of the main body portion 30, or may be different from the material of the main body portion 30. In one embodiment, the cutting portion 40 may be made of CBN and the main body 30 may be made of cemented carbide. In another aspect, the cutting portion 40 may be made of PCD and the main body 30 may be made of cemented carbide. In yet another aspect, the cutting portion 40 and the main body portion 30 may be made of cemented carbide. The combination of the main body portion 30 and the cutting portion 40 depending on the material is arbitrary. The color of the cutting portion 40 may be the same as the color of the main body portion 30, or may be different from the color of the main body portion 30.
　図３には、切削部４０を１つのみ有するインサート１１が示されている。しかしながら、インサート１１は、切削部４０を２つ有してもよいし、切削部４０を３つ以上有してもよい。１つの態様では、インサート１１は、矩形板形状を呈し、４つの角のそれぞれに切削部（合計４つの切削部）を有してよい。他の１つの態様では、インサート１１は、三角板形状を呈し、３つの角のそれぞれに切削部（合計３つの切削部）を有してよい。更に他の１つの態様では、インサート１１は、五角板形状を呈し、５つの角のそれぞれに５つの切削部（合計５つの切削部）を有してよい。 FIG. 3 shows an insert 11 having only one cutting portion 40. However, the insert 11 may have two cutting portions 40, or may have three or more cutting portions 40. In one embodiment, the insert 11 has a rectangular plate shape and may have cutting portions (a total of four cutting portions) at each of the four corners. In another aspect, the insert 11 has a triangular plate shape and may have cutting portions (a total of three cutting portions) at each of the three corners. In yet another aspect, the insert 11 has a pentagonal plate shape and may have five cuttings (a total of five cuttings) at each of the five corners.
　インサート１１は、上面２１と、下面２２と、側面２３と、を有してよい。更に、インサート１１には、上面２１及び下面２２に開口する貫通穴１１ａがあけられてよい。上面２１及び側面２３は、インサート１１の刃部４１を構成している。刃部４１が被削材Ｏｂ（図１参照）に接触し、これが切削される。 The insert 11 may have an upper surface 21, a lower surface 22, and a side surface 23. Further, the insert 11 may be provided with through holes 11a that open in the upper surface 21 and the lower surface 22. The upper surface 21 and the side surface 23 form the blade portion 41 of the insert 11. The blade portion 41 comes into contact with the work material Ob (see FIG. 1), and this is cut.
（上面）
　図２及び図３を参照する。上面２１は、本体部３０及び切削部４０の上方に臨む面であってよい。上面２１は、インサート１１がホルダ７０に固定された状態においてクランプ１３が当接する面であってよい。 (Top surface)
See FIGS. 2 and 3. The upper surface 21 may be a surface facing above the main body portion 30 and the cutting portion 40. The upper surface 21 may be a surface with which the clamp 13 abuts while the insert 11 is fixed to the holder 70.
　上面２１は、例えば、矩形状（ひし形を含む）、三角形状又は五角形状を呈してよい。上面２１は、下面２２に対して、平行であってもよいし、平行でなくてもよい。上面２１は、少なくとも一部に凹凸を有してもよい。 The upper surface 21 may have, for example, a rectangular shape (including a rhombus), a triangular shape, or a pentagonal shape. The upper surface 21 may or may not be parallel to the lower surface 22. The upper surface 21 may have irregularities at least in part.
　図３及び図４を参照する。図３に示すように、上面２１は、本体部上面３１と、切削部上面５０と、を有してよい。本体部上面３１は、本体部３０によって構成される面であり、上方に臨んでいる。 Refer to FIGS. 3 and 4. As shown in FIG. 3, the upper surface 21 may have an upper surface 31 of the main body portion and an upper surface 50 of the cutting portion. The upper surface 31 of the main body is a surface formed by the main body 30 and faces upward.
（切削部上面）
　切削部上面５０は、切削部４０を構成する面であり、上方に臨んでいる。本体部上面３１は、全体が平滑な面であってもよいし、所々に凹凸を有する面であってもよい。 (Upper surface of cutting part)
The upper surface 50 of the cutting portion is a surface constituting the cutting portion 40 and faces upward. The upper surface 31 of the main body may be a smooth surface as a whole, or may have irregularities in places.
　上面２１における切削部上面５０の占める割合は、３％以下、７％以下、１５％以下又は１５％以上とされてよい。切削部上面５０の形状は、任意である。例えば、切削部上面５０は、三角形状、矩形状又は略Ｖ字状（Ｕ字状も含む）を呈してよい。 The ratio of the upper surface 50 of the cutting portion to the upper surface 21 may be 3% or less, 7% or less, 15% or less, or 15% or more. The shape of the upper surface 50 of the cutting portion is arbitrary. For example, the upper surface 50 of the cutting portion may have a triangular shape, a rectangular shape, or a substantially V shape (including a U shape).
　図４を参照する。切削部上面５０は、切削部上面５０の角に位置する角部５１と、この角部５１に繋がった辺部５２、５２と、これら角部５１及び辺部５２、５２に沿って延びるすくい面５３と、このすくい面５３に繋がった連結面５４と、連結面５４に繋がりすくい面５３から離れるほど上方に向かう立ち上がり面６０と、この立ち上がり面６０と本体部上面３１（図３参照）とを繋ぐ接続面５５と、を有してよい。 Refer to FIG. The upper surface 50 of the cutting portion includes a corner portion 51 located at a corner of the upper surface portion 50 of the cutting portion, side portions 52 and 52 connected to the corner portion 51, and a rake surface extending along the corner portions 51 and the side portions 52 and 52. 53, a connecting surface 54 connected to the rake face 53, a rising surface 60 connected to the connecting surface 54 and facing upward as the distance from the rake surface 53 increases, and the rising surface 60 and the upper surface 31 of the main body (see FIG. 3). It may have a connecting surface 55 to be connected.
（角部）
　図４及び図６を参照する。角部５１は、切削部上面５０における側面２３との境界に位置してよい。角部５１は、平面視において外方に向かって膨らんだ凸曲線状を呈してよい。凸曲線状を呈する角部５１は、凸部の頂点から辺部５２、５２に向かう方向において、上方に傾斜していてもよいし、水平に延びていてもよいし、下方に傾斜していてもよい。尚、上記にいう凸曲線状とは、太さを有しない凸曲線に限定されず、所定の太さを有してもよい。凸曲線状を呈する角部５１の曲率は、任意である。 (Corner)
See FIGS. 4 and 6. The corner portion 51 may be located at the boundary with the side surface 23 on the upper surface 50 of the cutting portion. The corner portion 51 may exhibit a convex curved shape that bulges outward in a plan view. The corner portion 51 having a convex curved shape may be inclined upward, horizontally extended, or inclined downward in the direction from the apex of the convex portion toward the side portions 52, 52. May be good. The convex curve shape described above is not limited to a convex curve having no thickness, and may have a predetermined thickness. The curvature of the corner portion 51 exhibiting a convex curve shape is arbitrary.
（辺部）
　辺部５２、５２は、それぞれ角部５１に繋がり、角部５１から切削部上面５０の外縁に沿って延びていてよい。辺部５２、５２の角部５１から離れた端は、立ち上がり面６０（第２立ち上がり面６２）に繋がっていてよい。 (Side)
The side portions 52 and 52 are connected to the corner portions 51, respectively, and may extend from the corner portions 51 along the outer edge of the upper surface 50 of the cutting portion. The ends of the side portions 52, 52 separated from the corner portions 51 may be connected to the rising surface 60 (second rising surface 62).
　一方の辺部５２は、角部５１を正面に見て、角部５１の右側に位置している。他方の辺部５２は、同方向から見て、角部５１の左側に位置している。一方の辺部５２及び他方の辺部５２は、それぞれ離れている。 One side portion 52 is located on the right side of the corner portion 51 when the corner portion 51 is viewed from the front. The other side portion 52 is located on the left side of the corner portion 51 when viewed from the same direction. One side portion 52 and the other side portion 52 are separated from each other.
　辺部５２、５２は、線状を呈していてもよい。線状としては、直線状であってもよい。直線状は、厳密な直線を意味しなくてよい。例えば、辺部５２に沿う直線を仮定したときに、辺部５２と直線とのずれが０．０５ｍｍ以下又は０．０３ｍｍ以下の場合は、辺部５２は、直線状であると捉えられてよい。以下、他の説明で用いられる直線状の意味も同じであってよい。更に、直線状とは、太さを有しない直線に限定されず、所定の太さを有すると共に一直線に延びていることも含んでもよい。 The sides 52 and 52 may have a linear shape. The linear shape may be linear. A straight line does not have to mean an exact straight line. For example, assuming a straight line along the side portion 52, if the deviation between the side portion 52 and the straight line is 0.05 mm or less or 0.03 mm or less, the side portion 52 may be regarded as a straight line. .. Hereinafter, the meaning of the straight line used in other explanations may be the same. Further, the linear shape is not limited to a straight line having no thickness, and may include having a predetermined thickness and extending in a straight line.
　図３及び図４を参照する。辺部５２、５２は、角部５１から上方に傾斜していてもよいし、角部５１から水平方向に延びていてもよいし、角部５１から下方に傾斜していてもよい。尚、一方の辺部５２は、他方の辺部５２との関係で、傾斜角度が同一であってもよいし、傾斜角度が異なってもよい。例えば、一方の辺部５２が上方に向かう傾斜角度を有し、他方の辺部５２が下方に向かう傾斜角度を有してもよい。 Refer to FIGS. 3 and 4. The side portions 52, 52 may be inclined upward from the corner portion 51, may extend horizontally from the corner portion 51, or may be inclined downward from the corner portion 51. In addition, one side portion 52 may have the same inclination angle or may have a different inclination angle in relation to the other side portion 52. For example, one side 52 may have an upward tilt angle and the other side 52 may have a downward tilt angle.
　辺部５２、５２の長さは、任意である。例えば、辺部５２、５２は、互いの長さが同一であってもよいし、互いの長さが異なってもよい。辺部５２、５２は、それぞれ角部５１より長くてもよいし、角部５１より短くてもよい。辺部５２、５２は、それぞれ角部５１と長さが同一であってもよい。 The lengths of the sides 52 and 52 are arbitrary. For example, the side portions 52 and 52 may have the same length or different lengths from each other. The side portions 52 and 52 may be longer than the corner portion 51 or shorter than the corner portion 51, respectively. The side portions 52 and 52 may have the same length as the corner portions 51, respectively.
　角部５１及び辺部５２、５２は、被削材Ｏｂ（図１参照）の切削に直接寄与する切刃４１ａを構成してよい。切刃４１ａは、刃部４１の一部である。例えば、切刃４１ａは、インサート１１における、被削材Ｏｂを切削する際に被削材Ｏｂに食い込む部位である。切刃４１ａは、切削部上面５０と側面２３との間に位置する稜線であってよい。 The corner portion 51 and the side portions 52, 52 may form a cutting edge 41a that directly contributes to the cutting of the work material Ob (see FIG. 1). The cutting blade 41a is a part of the blade portion 41. For example, the cutting edge 41a is a portion of the insert 11 that bites into the work material Ob when cutting the work material Ob. The cutting edge 41a may be a ridge line located between the upper surface 50 and the side surface 23 of the cutting portion.
（すくい面）
　図４を参照する。すくい面５３は、辺部５２、５２及び角部５１に繋がっていてよい。言い換えると、すくい面５３は、切刃４１ａに繋がっていてよい。 (Scooping surface)
See FIG. The rake face 53 may be connected to the side portions 52, 52 and the corner portion 51. In other words, the rake face 53 may be connected to the cutting edge 41a.
　辺部５２、５２及び角部５１に沿ったすくい面５３は、辺部５２、５２及び角部５１から下方（下面２２）に向かって傾斜していてよい。すくい面５３の傾斜角度は、任意である。例えば、すくい面５３の傾斜角度は、１０度以下、２５度以下又は２５度以上とされてよい。更に、すくい面５３の傾斜角度は、角部５１及び辺部５２、５２に沿ったすくい面５３の各部位で異なっていてよい。 The rake face 53 along the side portions 52, 52 and the corner portion 51 may be inclined downward (lower surface 22) from the side portions 52, 52 and the corner portion 51. The inclination angle of the rake face 53 is arbitrary. For example, the inclination angle of the rake face 53 may be 10 degrees or less, 25 degrees or less, or 25 degrees or more. Further, the inclination angle of the rake face 53 may be different at each portion of the rake face 53 along the corner portion 51 and the side portions 52, 52.
　図６を参照する。平面視における、すくい面５３の形状は、任意である。例えば、図６に示す例のように、すくい面５３は、平面視において略Ｖ字形状（略Ｕ字形状を含む）を呈してよい。 Refer to FIG. The shape of the rake face 53 in a plan view is arbitrary. For example, as in the example shown in FIG. 6, the rake face 53 may have a substantially V-shape (including a substantially U-shape) in a plan view.
　すくい面５３は、角部５１に沿った第１すくい面５３ａと、この第１すくい面５３ａに繋がり辺部５２、５２に沿った第２すくい面５３ｂ、５３ｂと、を有してよい。 The rake face 53 may have a first rake face 53a along the corner portion 51 and second rake faces 53b and 53b connected to the first rake face 53a and along the side portions 52 and 52.
　第１すくい面５３ａは、平面視において、所定の大きさの幅を有しつつ湾曲していてよい。第１すくい面５３ａは、平面視において、その幅（角部５１に直交する方向の長さ）が角部５１に沿って一定であってよい（一定でなくてもよい。）。第１すくい面５３ａの所定の箇所における幅をＷ１とし、この所定の箇所とは異なる箇所の幅をＷ２とした場合、Ｗ１＝Ｗ２となっていてよい。上記にいう一定は、例えば、角部５１の外縁に沿って第１すくい面を辿った場合に、上記の幅が０．０３ｍｍ以上変化しないこととされてよい。第１すくい面５３ａの幅は、例えば、０．０５ｍｍ以上０．３ｍｍ以下であってよい。 The first rake face 53a may be curved while having a width of a predetermined size in a plan view. The width (length in the direction orthogonal to the corner portion 51) of the first rake face 53a may be constant (may not be constant) along the corner portion 51 in a plan view. When the width of the first rake face 53a at a predetermined portion is W1 and the width of a portion different from the predetermined portion is W2, W1 = W2 may be set. The constant mentioned above may be such that the width does not change by 0.03 mm or more when the first rake face is traced along the outer edge of the corner portion 51, for example. The width of the first rake face 53a may be, for example, 0.05 mm or more and 0.3 mm or less.
　第２すくい面５３ｂ、５３ｂは、所定の大きさの幅を有していてよい。例えば、第２すくい面５３ｂの幅（平面視において辺部５２、５２に直交する方向の長さ）は、平面視において、第１すくい面５３ａから離れるほど小さくなっていてよい。即ち、第２すくい面５３ｂ、５３ｂにおける所定の箇所の幅をＷ３とし、この箇所より第１すくい面５３ａから離れた箇所の幅をＷ４とした場合、Ｗ３＞Ｗ４となっていてよい。 The second rake face 53b, 53b may have a width of a predetermined size. For example, the width of the second rake face 53b (the length in the direction orthogonal to the side portions 52, 52 in the plan view) may be smaller as the distance from the first rake face 53a is increased in the plan view. That is, when the width of the predetermined portion on the second rake face 53b, 53b is W3 and the width of the portion away from the first rake surface 53a is W4, W3> W4 may be satisfied.
　例えば、第２すくい面５３ｂにおける第１すくい面５３ａの近傍の幅は、第２すくい面５３ｂにおける第１すくい面５３ａから最も離れた部位の幅に対し、２倍以上、４倍以上若しくは８倍以上とされてよく、又は１倍超２倍未満とされてもよい。 For example, the width of the second rake face 53b in the vicinity of the first rake face 53a is twice or more, four times or more, or eight times the width of the portion of the second rake face 53b that is farthest from the first rake face 53a. It may be more than 1 time, or more than 1 time and less than 2 times.
　第２すくい面５３ｂ、５３ｂの長さ（辺部５２、５２に沿う方向）は、互いに同一であってもよいし、互いに異なっていてもよい。更に、第２すくい面５３ｂ、５３ｂの長さは、第１すくい面５３ａの長さ（角部５１に沿う方向）に対して、同一であってもよいし、異なっていてもよい。 The lengths of the second rake faces 53b and 53b (directions along the sides 52 and 52) may be the same as each other or may be different from each other. Further, the lengths of the second rake face 53b and 53b may be the same or different with respect to the length of the first rake face 53a (direction along the corner portion 51).
（連結面）
　図４に示す連結面５４は、すくい面５３及び立ち上がり面６０を繋いでいる。図示の例では、連結面５４は、すくい面５３の下辺、及び、立ち上がり面６０の下辺に繋がっている。 (Connecting surface)
The connecting surface 54 shown in FIG. 4 connects the rake surface 53 and the rising surface 60. In the illustrated example, the connecting surface 54 is connected to the lower side of the rake face 53 and the lower side of the rising surface 60.
　連結面５４は、すくい面５３から立ち上がり面６０に向かう方向（平面視において線状の角部５１に直交する方向）において、所定の大きさの幅を有してよい。連結面５４の幅は、すくい面５３及び立ち上がり面６０に沿って、大きさが同一であってもよいし、大きさが異なっていてもよい。 The connecting surface 54 may have a width of a predetermined size in the direction from the rake surface 53 to the rising surface 60 (the direction orthogonal to the linear corner portion 51 in a plan view). The width of the connecting surface 54 may be the same or different along the rake face 53 and the rising surface 60.
　（立ち上がり面）
　繰り返しになるが、立ち上がり面６０は、連結面５４及び接続面５５に繋がっていてよい。立ち上がり面６０は、すくい面５３を介して切刃４１ａから離れていてよく、すくい面５３から離れるほど上方に向かっていてよい。立ち上がり面６０の下辺は、連結面５４に繋がっていてよい。一方、立ち上がり面６０の上辺は、接続面５５に繋がってよい。これらの上辺及び下辺は、側面視及び／又は平面視において、直線状に延びた部位を含んでもよいし、曲線状に延びた部位を含んでいてもよい。以下、説明に用いられる各部位の上辺及び下辺についても同一である。 (Rising surface)
Again, the rising surface 60 may be connected to the connecting surface 54 and the connecting surface 55. The rising surface 60 may be separated from the cutting edge 41a via the rake surface 53, and may be directed upward as the distance from the rake surface 53 increases. The lower side of the rising surface 60 may be connected to the connecting surface 54. On the other hand, the upper side of the rising surface 60 may be connected to the connecting surface 55. These upper and lower sides may include a linearly extending portion or a curvedly extending portion in side view and / or plan view. Hereinafter, the same applies to the upper side and the lower side of each part used in the description.
　図４に示すように、立ち上がり面６０は、第１立ち上がり面６１と、第２立ち上がり面６２と、第３立ち上がり面６３と、を有してよい。第１立ち上がり面６１は、連結面５４及び第２立ち上がり面６２に繋がってよい。第３立ち上がり面６３は、第２立ち上がり面６２及び接続面５５に繋がってよい。第２立ち上がり面６２は、第１立ち上がり面６１及び第３立ち上がり面６３の間に位置してよい。以下、第１～第３立ち上がり面６１、６２、６３の説明をする。 As shown in FIG. 4, the rising surface 60 may have a first rising surface 61, a second rising surface 62, and a third rising surface 63. The first rising surface 61 may be connected to the connecting surface 54 and the second rising surface 62. The third rising surface 63 may be connected to the second rising surface 62 and the connecting surface 55. The second rising surface 62 may be located between the first rising surface 61 and the third rising surface 63. Hereinafter, the first to third rising surfaces 61, 62, and 63 will be described.
（第１立ち上がり面）
　第１立ち上がり面６１は、すくい面５３及び連結面５４を介して切刃４１ａから離れてよい。第１立ち上がり面６１は、切刃４１ａから離れるほど上方に向かってよい。即ち、第１立ち上がり面６１は、連結面５４から第２立ち上がり面６２に向かう方向において、上り勾配になってよい。第１立ち上がり面６１が上り勾配となっていることにより、インサート１１には、すくい面５３、連結面５４及び第１立ち上がり面６１によって構成された溝が形成される。この溝は、例えば、底面が平らであってもよい。 (1st rising surface)
The first rising surface 61 may be separated from the cutting edge 41a via the rake surface 53 and the connecting surface 54. The first rising surface 61 may move upward as the distance from the cutting edge 41a increases. That is, the first rising surface 61 may have an uphill slope in the direction from the connecting surface 54 toward the second rising surface 62. Since the first rising surface 61 has an ascending slope, the insert 11 is formed with a groove formed by the rake surface 53, the connecting surface 54, and the first rising surface 61. This groove may have a flat bottom surface, for example.
　第１立ち上がり面６１は、角部５１を二等分する直線Ｌ１上に位置する第１領域６１ａと、この第１領域６１ａと繋がっている第２領域６１ｂ、６１ｂと、を有してよい。第１領域６１ａは、連結面５４の角部５１に沿った部位に繋がっていてよい。別の観点では、第１領域６１ａは、角部５１に沿っていてよい。一方、第２領域６１ｂ、６１ｂは、連結面５４の辺部５２、５２に沿った部位に繋がっていてよい。別の観点では、第２領域６１ｂ、６１ｂは、辺部５２、５２に沿っていてよい。以下、第１領域６１ａ及び第２領域６１ｂ、６１ｂの詳細を説明する。 The first rising surface 61 may have a first region 61a located on a straight line L1 that bisects the corner portion 51, and second regions 61b and 61b connected to the first region 61a. The first region 61a may be connected to a portion along the corner portion 51 of the connecting surface 54. From another point of view, the first region 61a may be along the corner 51. On the other hand, the second regions 61b and 61b may be connected to the portions along the side portions 52 and 52 of the connecting surface 54. From another point of view, the second regions 61b, 61b may be along the sides 52, 52. Hereinafter, the details of the first region 61a and the second regions 61b and 61b will be described.
（第１領域）
　図４及び図５Ａを参照する。１つの態様では、第１領域６１ａは、角部５１の二等分する直線Ｌ１に沿った断面視において、連結面５４から第２立ち上がり面６２に向かった直線状であってよい。他の１つの態様では、第１領域６１ａは、直線Ｌ１に沿った断面視において、連結面５４から第２立ち上がり面６２に向かって湾曲した線状であってよい。湾曲は、凸状及び凹状のいずれであってもよい。 (1st area)
See FIGS. 4 and 5A. In one aspect, the first region 61a may be a straight line from the connecting surface 54 to the second rising surface 62 in a cross-sectional view along the bisected straight line L1 of the corner portion 51. In another aspect, the first region 61a may be linearly curved from the connecting surface 54 to the second rising surface 62 in cross-sectional view along the straight line L1. The curvature may be convex or concave.
　第１領域６１ａは、連結面５４から第２立ち上がり面６２に向かう方向において、上方に向かう傾斜角度を有してよい。ここで、第１領域６１ａの傾斜角度をΘ１とした場合、Θ１は、例えば、８０度以上９０度以下、６５度以上８０度以下、４５度以上６５度以下、又は０度超４５度未満とされてよい。 The first region 61a may have an upward inclination angle in the direction from the connecting surface 54 to the second rising surface 62. Here, when the inclination angle of the first region 61a is Θ1, Θ1 is, for example, 80 degrees or more and 90 degrees or less, 65 degrees or more and 80 degrees or less, 45 degrees or more and 65 degrees or less, or 0 degrees or more and less than 45 degrees. May be done.
　例えば、傾斜角度Θ１は、直線Ｌ１（図４参照）に沿ったインサート１１の断面において、第１領域６１ａの傾斜した角度を測ることにより求めてよい。例えば、第１領域６１ａが湾曲している場合には、傾斜角度Θ１は、角部５１の二等分線に沿ったインサート１１の断面において、第１領域６１ａの下辺と上辺とを繋いだ直線の傾斜角度を測ることによって求めてよい。尚、後述する第３領域６２ａの傾斜角度の求め方も、これと同一であってよい。 For example, the inclination angle Θ1 may be obtained by measuring the inclination angle of the first region 61a in the cross section of the insert 11 along the straight line L1 (see FIG. 4). For example, when the first region 61a is curved, the inclination angle Θ1 is a straight line connecting the lower side and the upper side of the first region 61a in the cross section of the insert 11 along the bisector of the corner portion 51. It may be obtained by measuring the inclination angle of. The method of obtaining the inclination angle of the third region 62a, which will be described later, may be the same as this.
　第１領域６１ａの上辺は、切刃４１ａ（角部５１）に対して、上方に位置してもよいし、下方に位置してもよいし、同一の高さに位置してもよい。第１領域６１ａは、平面視において角部５１に直交する方向の幅が一定であってよい。例えば、この方向における第１領域６１ａの幅をＡ１とした場合、幅Ａ１は、第１領域６１ａに沿って一定であってよい。ここでいう一定は、例えば、角部５１に沿って第１領域６１ａを辿った場合、上記の幅が０．０５ｍｍ以上変化しないこととされてよい。 The upper side of the first region 61a may be located above, below, or at the same height as the cutting edge 41a (corner portion 51). The width of the first region 61a in the direction orthogonal to the corner portion 51 in a plan view may be constant. For example, when the width of the first region 61a in this direction is A1, the width A1 may be constant along the first region 61a. The constant here may be that, for example, when the first region 61a is traced along the corner portion 51, the above width does not change by 0.05 mm or more.
　図６を併せて参照する。第１領域６１ａは、平面視において、外方（切刃４１ａ）に向かう凸状を呈してよい。また、水平方向に沿った断面視において、第１領域６１ａは、角部５１に沿って曲がる曲線を有してよい。この曲線は、上下方向において、第１領域６１ａのうち、全体、中央部、又は中央部とは離れた箇所のいずれに現れてもよい。ただし、水平方向に沿った断面視において、第１領域６１ａは、曲線を含まずに構成されてもよい。第１領域６１ａの大きさ及び形状は、任意である。 Refer to FIG. 6 as well. The first region 61a may have a convex shape toward the outside (cutting edge 41a) in a plan view. Further, in a cross-sectional view along the horizontal direction, the first region 61a may have a curve that bends along the corner portion 51. This curve may appear in the whole, the central portion, or a portion distant from the central portion in the first region 61a in the vertical direction. However, in the cross-sectional view along the horizontal direction, the first region 61a may be configured not to include a curve. The size and shape of the first region 61a are arbitrary.
（第２領域）
　図４を参照する。第２領域６１ｂ、６１ｂの大きさは、任意である。例えば、第２領域６１ｂ、６１ｂの表面積は、第１領域６１ａの表面積に対して、大きくてもよいし、同一の大きさでもよいし、小さくてもよい。第２領域６１ｂの形状は、任意である。例えば、第２領域６１ｂの形状は、略三角形状であってよい。 (Second area)
See FIG. The sizes of the second regions 61b and 61b are arbitrary. For example, the surface areas of the second regions 61b and 61b may be larger, the same size, or smaller than the surface area of the first region 61a. The shape of the second region 61b is arbitrary. For example, the shape of the second region 61b may be substantially triangular.
　図５Ｂ及び図５Ｃを参照する。図５Ｂ及び図５Ｃには、平面視において辺部５２、５２に直交する直線Ｌ２（図４参照）に沿ったインサート１１の断面が示されている。例えば、第２領域６１ｂ、６１ｂは、その幅（平面視において辺部５２、５２に直交する方向の長さ）が第１領域６１ａから離れるほど小さくなっていてよい。図５Ｄを併せて参照する。第１領域６１ａの近傍における第２領域６１ｂの幅をＡ２とし、第１領域６１ａから離れた部位における第２領域６１ｂの幅をＡ３とした場合、Ａ２＞Ａ３となっていてよい。 See FIGS. 5B and 5C. 5B and 5C show a cross section of the insert 11 along a straight line L2 (see FIG. 4) orthogonal to the sides 52, 52 in a plan view. For example, the widths of the second regions 61b and 61b (the length in the direction orthogonal to the side portions 52 and 52 in a plan view) may become smaller as the width thereof is separated from the first region 61a. See also FIG. 5D. When the width of the second region 61b in the vicinity of the first region 61a is A2 and the width of the second region 61b in the portion away from the first region 61a is A3, A2> A3 may be satisfied.
　図４を参照する。角部５１の中央を正面に見て、一方の第２領域６１ｂは、第１領域６１ａの右側に位置してよい。同方向に見て、他方の第２領域６１ｂは、第１領域６１ａの左側に位置してよい。一方の第２領域６１ｂは、他方の第２領域６１ｂと大きさが同一であってもよいし、他方の第２領域６１ｂと大きさが異なってもよい。 Refer to FIG. When the center of the corner portion 51 is viewed from the front, one second region 61b may be located on the right side of the first region 61a. Seen in the same direction, the other second region 61b may be located to the left of the first region 61a. One second region 61b may be the same size as the other second region 61b, or may be different in size from the other second region 61b.
　図４、図５Ｂを参照する。１つの態様では、直線Ｌ２に沿った断面視において、第２領域６１ｂ、６１ｂは、連結面５４から第２立ち上がり面６２に向かって直線状に延びていてよい。他の１つの態様では、直線Ｌ２に沿った断面視において、第２領域６１ｂ、６１ｂは、連結面５４から第２立ち上がり面６２に向かって曲線状に延びていてよい。曲線は、外方に対して凸状及び凹状のいずれであってもよい。第２領域６１ｂ、６１ｂは、連結面５４から第２立ち上がり面６２に向かう方向において、上方に向かう傾斜角度を有してもよい。 Refer to FIGS. 4 and 5B. In one aspect, the second regions 61b, 61b may extend linearly from the connecting surface 54 toward the second rising surface 62 in a cross-sectional view along the straight line L2. In another aspect, in cross-sectional view along the straight line L2, the second regions 61b, 61b may extend curvedly from the connecting surface 54 toward the second rising surface 62. The curve may be convex or concave with respect to the outside. The second regions 61b and 61b may have an upward inclination angle in the direction from the connecting surface 54 toward the second rising surface 62.
　ここで、第２領域６１ｂ、６１ｂの傾斜角度をΘ２、Θ２（図５Ｂ～図５Ｄには、一方の第２領域６１ｂの傾斜角度Θ２のみ示されている）とした場合、傾斜角度Θ２、Θ２は、例えば、６０度以上９０度以下、３５度以上６０度以下、又は０度超４５度未満とされてよい。但し、第２領域６１ｂ、６１ｂの傾斜角度Θ２、Θ２は、第１領域６１ａの傾斜角度Θ１（図５Ａ参照）より小さい。第２領域６１ｂ、６１ｂの傾斜角度Θ２、Θ２は、直線Ｌ２に沿った断面の傾斜角度を測ることにより求めてよい。第２領域６１ｂ、６１ｂが湾曲している場合は、例えば、第２領域６１ｂ、６１ｂの下辺と上辺とを繋いだ直線の傾斜角度Θ２、Θ２を測ることによって求めてよい。後述する第４領域６２ｂ、６２ｂの傾斜角度Θ４、Θ４の求め方もこれと同一であってよい。 Here, when the inclination angles of the second regions 61b and 61b are Θ2 and Θ2 (in FIGS. 5B to 5D, only the inclination angle Θ2 of one of the second regions 61b is shown), the inclination angles Θ2 and Θ2. May be, for example, 60 degrees or more and 90 degrees or less, 35 degrees or more and 60 degrees or less, or more than 0 degrees and less than 45 degrees. However, the inclination angles Θ2 and Θ2 of the second regions 61b and 61b are smaller than the inclination angles Θ1 (see FIG. 5A) of the first region 61a. The inclination angles Θ2 and Θ2 of the second regions 61b and 61b may be obtained by measuring the inclination angle of the cross section along the straight line L2. When the second regions 61b and 61b are curved, it may be obtained by measuring, for example, the inclination angles Θ2 and Θ2 of a straight line connecting the lower side and the upper side of the second regions 61b and 61b. The method of obtaining the inclination angles Θ4 and Θ4 of the fourth regions 62b and 62b, which will be described later, may be the same as this.
　第２領域６１ｂ、６１ｂの上辺は、切刃４１ａ（辺部５２、５２）に対して、上方に位置してもよいし、下方に位置してもよいし、同一の高さに位置してもよい。第２領域６１ｂ、６１ｂの上辺は、少なくとも一部が切刃４１ａより下方に位置する部位を有してよい。 The upper sides of the second regions 61b, 61b may be located above, below, or at the same height as the cutting edge 41a (sides 52, 52). May be good. The upper sides of the second regions 61b and 61b may have at least a portion located below the cutting edge 41a.
　第２領域６１ｂ、６１ｂの上辺は、第１領域６１ａから離れる方向において、下方に傾斜して延びていてよい。別の観点では、第２領域６１ｂは、第１領域６１ａから離れる方向に向かって幅が小さくなっていてよい。この時、第２領域６１ｂ、６１ｂの上辺は、第１領域６１ａの近傍に位置する部位が切刃４１ａより上方に位置してよく、第１領域６１ａから最も離れた部位が切刃４１ａより下方に位置してよい。 The upper sides of the second regions 61b and 61b may be inclined downward and extend in a direction away from the first region 61a. From another point of view, the width of the second region 61b may decrease in the direction away from the first region 61a. At this time, on the upper sides of the second regions 61b and 61b, the portion located near the first region 61a may be located above the cutting edge 41a, and the portion farthest from the first region 61a is below the cutting blade 41a. May be located in.
　図６を参照する。第２領域６１ｂにおける第１領域６１ａの近傍に位置する部位は、角部５１（第１すくい面５３ａ）に沿っていてよい。第２領域６１ｂ、６１ｂは、角部５１に沿う部位を有していてよい、ともいえる。 Refer to FIG. The portion of the second region 61b located in the vicinity of the first region 61a may be along the corner portion 51 (first rake face 53a). It can be said that the second regions 61b and 61b may have a portion along the corner portion 51.
（第２立ち上がり面）
　図４を参照する。第２立ち上がり面６２は、切刃４１ａ（すくい面５３）から離れるほど上方に向かっていてよい。即ち、第２立ち上がり面６２は、第１立ち上がり面６１から第３立ち上がり面６３に向かう方向において、上り勾配になってよい。 (2nd rising surface)
See FIG. The second rising surface 62 may be directed upward as the distance from the cutting edge 41a (rake surface 53) increases. That is, the second rising surface 62 may have an ascending slope in the direction from the first rising surface 61 to the third rising surface 63.
　第２立ち上がり面６２は、第３領域６２ａと、第４領域６２ｂ、６２ｂと、第５領域６２ｃ、６２ｃと、を有してよい。第３領域６２ａ及び第４領域６２ｂ、６２ｂは、第１立ち上がり面６１に繋がっていてよい。第５領域６２ｃ、６２ｃは、それぞれ第４領域６２ｂ、６２ｂに繋がっていてよい。 The second rising surface 62 may have a third region 62a, a fourth region 62b, 62b, and a fifth region 62c, 62c. The third region 62a and the fourth regions 62b, 62b may be connected to the first rising surface 61. The fifth regions 62c and 62c may be connected to the fourth regions 62b and 62b, respectively.
（第３領域）
　第３領域６２ａは、角部５１に沿っていてよい。第３領域６２ａは、下辺が第１領域６１ａに繋がり、上辺が第３立ち上がり面６３に繋がっていてよい。 (Third area)
The third region 62a may be along the corner portion 51. The lower side of the third region 62a may be connected to the first region 61a, and the upper side may be connected to the third rising surface 63.
　第３領域６２ａの大きさは、任意である。例えば、第３領域６２ａの表面積は、第１領域６１ａの表面積に対して、大きくてもよいし、同一の大きさでもよいし、小さくてもよい。 The size of the third region 62a is arbitrary. For example, the surface area of the third region 62a may be larger, the same size, or smaller than the surface area of the first region 61a.
　１つの態様では、第３領域６２ａは、角部５１を二等分する直線Ｌ１に沿った断面視において、第１領域６１ａから第３立ち上がり面６３に向かって一直線に延びていてよい。他の１つの態様では、第３領域６２ａは、直線Ｌ１に沿った断面視において、第１領域６１ａから第３立ち上がり面６３に向かって湾曲して延びていてよい。図５Ａを併せて参照する。このように湾曲している第３領域６２ａは、直線Ｌ１に沿った断面視において、例えば、外方（斜め上方）に向かう凸状を呈してよい（凹状を呈してもよい。）。 In one aspect, the third region 62a may extend in a straight line from the first region 61a toward the third rising surface 63 in a cross-sectional view along a straight line L1 that bisects the corner portion 51. In another aspect, the third region 62a may extend curvedly from the first region 61a toward the third rising surface 63 in a cross-sectional view along the straight line L1. See also FIG. 5A. The third region 62a, which is curved in this way, may have a convex shape toward the outside (obliquely upward), for example, in a cross-sectional view along the straight line L1 (may have a concave shape).
　第３領域６２ａは、第１領域６１ａから接続面５５に向かう方向において、上方に向かう傾斜角度を有している。第３領域６２ａの傾斜角度をΘ３とした場合、傾斜角度Θ３は、例えば、４５度以上９０度以下、２５度以上９０度以下、又は０度超２５度未満とされてよい。傾斜角度Θ３は、例えば、第１領域６１ａの傾斜角度Θ１よりも小さくてよい。 The third region 62a has an upward inclination angle in the direction from the first region 61a toward the connecting surface 55. When the inclination angle of the third region 62a is Θ3, the inclination angle Θ3 may be, for example, 45 degrees or more and 90 degrees or less, 25 degrees or more and 90 degrees or less, or more than 0 degrees and less than 25 degrees. The tilt angle Θ3 may be smaller than, for example, the tilt angle Θ1 of the first region 61a.
　第３領域６２ａの形状は、任意である。例えば、第３領域６２ａは、その全体が略矩形状又は台形形状を呈してよい。 The shape of the third region 62a is arbitrary. For example, the third region 62a may have a substantially rectangular shape or a trapezoidal shape as a whole.
（第４領域）
　図４及び図５Ｂを参照する。第４領域６２ｂ、６２ｂは、辺部５２、５２に沿って延びていてよい。図４に示すように、第４領域６２ｂ、６２ｂは、下辺が第２領域６１ｂ、６１ｂに繋がり、上辺が第３立ち上がり面６３に繋がっていてよい。 (4th area)
See FIGS. 4 and 5B. The fourth regions 62b, 62b may extend along the sides 52, 52. As shown in FIG. 4, in the fourth regions 62b and 62b, the lower side may be connected to the second regions 61b and 61b, and the upper side may be connected to the third rising surface 63.
　第４領域６２ｂ、６２ｂの大きさ及び形状は、任意である。例えば、第４領域６２ｂ、６２ｂの表面積は、第２領域６１ｂ、６１ｂの表面積に比較して、大きくてもよいし、同一の大きさでもよいし、小さくてもよい。第４領域６２ｂ、６２ｂの形状は、例えば、矩形状又は台形形状であってよい。 The size and shape of the fourth regions 62b and 62b are arbitrary. For example, the surface area of the fourth regions 62b, 62b may be larger, the same size, or smaller than the surface area of the second regions 61b, 61b. The shapes of the fourth regions 62b and 62b may be, for example, a rectangular shape or a trapezoidal shape.
　第４領域６２ｂ、６２ｂは、第２領域６１ｂ、６１ｂから第３立ち上がり面６３に向かって、真っ直ぐ延びていてもよいし、湾曲して延びていてもよい。湾曲は、外方に対して凸状及び凹状のいずれであってもよい。第４領域６２ｂ、６２ｂの傾斜角度をそれぞれΘ４とした場合、傾斜角度Θ４、Θ４（図５Ｂには、一方の第４領域６２ｂの傾斜角度Θ４のみ示されている）は、例えば、４５度以上９０度以下、２５度以上９０度以下、又は０度超２５度未満とされてよい。傾斜角度Θ４、Θ４は、第２領域６１ｂ、６１ｂの傾斜角度Θ２、Θ２より小さくてもよい。傾斜角度Θ３（図５Ａ参照）と傾斜角度Θ４、Θ４とに着目した場合、傾斜角度Θ３は、傾斜角度Θ４、Θ４と比較して、大きくてもよいし、小さくてもよいし、同一であってもよい。 The fourth regions 62b and 62b may extend straight from the second regions 61b and 61b toward the third rising surface 63, or may extend in a curved manner. The curvature may be convex or concave with respect to the outside. When the inclination angles of the fourth region 62b and 62b are Θ4, respectively, the inclination angles Θ4 and Θ4 (only the inclination angle Θ4 of one of the fourth regions 62b is shown in FIG. 5B) are, for example, 45 degrees or more. It may be 90 degrees or less, 25 degrees or more and 90 degrees or less, or more than 0 degrees and less than 25 degrees. The tilt angles Θ4 and Θ4 may be smaller than the tilt angles Θ2 and Θ2 of the second regions 61b and 61b. When focusing on the tilt angles Θ3 (see FIG. 5A) and the tilt angles Θ4 and Θ4, the tilt angles Θ3 may be larger, smaller, or the same as those of the tilt angles Θ4 and Θ4. You may.
（第５領域）
　第５領域６２ｃ、６２ｃは、それぞれ第４領域６２ｂ、６２ｂから切削部上面５０の外縁まで延びていてよい。第５領域６２ｃ、６２ｃの大きさ及び形状は、任意である。１つの態様では、第５領域６２ｃ、６２ｃの表面積は、第２領域６１ｂ、６１ｂの表面積より大きくてよい。第５領域６２ｃ、６２ｃの表面積は、第４領域６２ｂ、６２ｂの表面積に比較して、大きくてもよいし、小さくてもよいし、同一であってもよい。第５領域６２ｃ、６２ｃの形状は、例えば、矩形状又は台形形状とされてよい。 (5th area)
The fifth regions 62c and 62c may extend from the fourth regions 62b and 62b to the outer edge of the upper surface 50 of the cutting portion, respectively. The size and shape of the fifth regions 62c and 62c are arbitrary. In one embodiment, the surface area of the fifth regions 62c, 62c may be larger than the surface area of the second regions 61b, 61b. The surface areas of the fifth regions 62c and 62c may be larger, smaller, or the same as the surface areas of the fourth regions 62b and 62b. The shapes of the fifth regions 62c and 62c may be, for example, a rectangular shape or a trapezoidal shape.
　第５領域６２ｃ、６２ｃは、すくい面５３から第３立ち上がり面６３に向かう方向において、上方に傾斜していてよい。このように傾斜する第５領域６２ｃ、６２ｃは、すくい面５３から第３立ち上がり面６３に向かって、直線状であってもよいし、曲線状であってもよい。曲線状は、外方に対して凹状であってもよいし、凸状であってもよい。第５領域６２ｃ、６２ｃの傾斜角度をそれぞれΘ５（図中には示されていない）とした場合、傾斜角度Θ５、Θ５は、例えば、第４領域６２ｂ、６２ｂの傾斜角度Θ４、Θ４に比較して、大きくてもよいし、小さくてもよいし、同一であってもよい。 The fifth regions 62c and 62c may be inclined upward in the direction from the rake surface 53 to the third rising surface 63. The fifth regions 62c and 62c that are inclined in this way may be linear or curved from the rake face 53 toward the third rising surface 63. The curved shape may be concave or convex with respect to the outside. When the inclination angles of the fifth regions 62c and 62c are Θ5 (not shown in the figure), the inclination angles Θ5 and Θ5 are compared with, for example, the inclination angles Θ4 and Θ4 of the fourth regions 62b and 62b. It may be large, small, or the same.
（第３立ち上がり面）
　図４を参照する。第３立ち上がり面６３は、切刃４１ａから離れるほど上方に向かってよい。即ち、第３立ち上がり面６３は、第２立ち上がり面６１から本体部上面３１に向かう方向において、上り勾配になってよい。 (Third rising surface)
See FIG. The third rising surface 63 may move upward as the distance from the cutting edge 41a increases. That is, the third rising surface 63 may have an upward slope in the direction from the second rising surface 61 toward the upper surface 31 of the main body.
　第３立ち上がり面６３は、第６領域６３ａと、第７領域６３ｂ、６３ｂと、第８領域６３ｃ、６３ｃと、を有してよい。第６領域６３ａは、第２立ち上がり面６２の角部５１に沿った部位（第３領域６２ａ）に繋がっていてよい。第７領域６３ｂ、６３ｂは、第２立ち上がり面６２の辺部５２、５２に沿った部位（第４領域６２ｂ、６２ｂ）に繋がってよい。第８領域６３ｃ、６３ｃは、それぞれ第７領域６３ｂ、６３ｂに繋がり、第７領域６３ｂ、６３ｂからインサート１１の外縁まで延びている。 The third rising surface 63 may have a sixth region 63a, a seventh region 63b, 63b, and an eighth region 63c, 63c. The sixth region 63a may be connected to a portion (third region 62a) along the corner portion 51 of the second rising surface 62. The seventh regions 63b and 63b may be connected to the portions ( fourth regions 62b and 62b) along the side portions 52 and 52 of the second rising surface 62. The eighth regions 63c and 63c are connected to the seventh regions 63b and 63b, respectively, and extend from the seventh regions 63b and 63b to the outer edge of the insert 11.
（第６領域）
　図４及び図５Ａを参照する。第６領域６３ａは、角部５１に沿っていてよい。第６領域６３ａの大きさ及び形状の説明については、第３領域６２ａの大きさ及び形状の説明を援用してよい。 (6th area)
See FIGS. 4 and 5A. The sixth region 63a may be along the corner portion 51. As for the description of the size and shape of the sixth region 63a, the description of the size and shape of the third region 62a may be incorporated.
　第６領域６３ａは、角部５１に沿っていてよい。図４に示すように、第６領域６３ａは、下辺が第３領域６２ａに繋がり、上辺が接続面５５に繋がっていてよい。第６領域６３ａの大きさ及び形状の説明については、第３領域６２ａの大きさ及び形状の説明を援用してよい。 The sixth region 63a may be along the corner portion 51. As shown in FIG. 4, in the sixth region 63a, the lower side may be connected to the third region 62a and the upper side may be connected to the connecting surface 55. As for the description of the size and shape of the sixth region 63a, the description of the size and shape of the third region 62a may be incorporated.
　第６領域６３ａは、曲面であってもよいし、曲面でなくてもよい。第６領域６３ａの傾斜角度をΘ６とした場合、傾斜角度Θ６は、例えば、第３領域６２ａの傾斜角度Θ３に比較して、小さくてもよいし、大きくてもよい。 The sixth region 63a may or may not be a curved surface. When the inclination angle of the sixth region 63a is Θ6, the inclination angle Θ6 may be smaller or larger than, for example, the inclination angle Θ3 of the third region 62a.
（第７領域）
　図４及び図５Ｂを参照する。第７領域６３ｂ、６３ｂは、辺部５２、５２に沿っていてよい。図４に示すように、第７領域６３ｂ、６３ｂは、下辺が第４領域６２ｂ、６２ｂに繋がり、上辺が接続面５５に繋がっていてよい。第７領域６３ｂ、６３ｂの大きさ及び形状の説明については、第４領域６２ｂ、６２ｂの大きさ及び形状の説明を援用してよい。 (7th area)
See FIGS. 4 and 5B. The seventh regions 63b and 63b may be along the sides 52 and 52. As shown in FIG. 4, in the seventh region 63b, 63b, the lower side may be connected to the fourth region 62b, 62b, and the upper side may be connected to the connection surface 55. As for the description of the size and shape of the seventh regions 63b and 63b, the description of the size and shape of the fourth regions 62b and 62b may be incorporated.
　第７領域６３ｂ、６３ｂは、曲面であってもよいし、曲面でなくてもよい。第７領域６３ｂの傾斜角度をそれぞれΘ７（図５Ｂ及び図５Ｃには、一方の第７領域６３ｂの傾斜角度Θ７のみ示されている）とした場合、傾斜角度Θ７、Θ７は、例えば、第４領域６２ｂ、６２ｂの傾斜角度Θ４、Θ４に比較して、小さくてもよいし、大きくてもよいし、同一であってもよい。 The seventh regions 63b and 63b may or may not be curved surfaces. Assuming that the inclination angles of the seventh region 63b are Θ7 (only the inclination angle Θ7 of one of the seventh regions 63b is shown in FIGS. 5B and 5C), the inclination angles Θ7 and Θ7 are, for example, the fourth. It may be smaller, larger, or the same as the inclination angles Θ4 and Θ4 of the regions 62b and 62b.
（第８領域）
　第８領域６３ｃ、６３ｃは、第５領域６２ｃ、６２ｃと接続面５５とを繋いでいる。第８領域６３ｃ、６３ｃの大きさ及び形状の説明については、第５領域６２ｃ、６２ｃの大きさ及び形状の説明を援用してよい。 (8th area)
The eighth regions 63c and 63c connect the fifth regions 62c and 62c with the connecting surface 55. As for the description of the size and shape of the eighth regions 63c and 63c, the description of the size and shape of the fifth regions 62c and 62c may be incorporated.
　第８領域６３ｃ、６３ｃは、曲面であってもよいし、曲面でなくてもよい。第８領域６３ｃ、６３ｃの傾斜角度をそれぞれΘ８（図中には示されていない）とした場合、傾斜角度Θ８、Θ８は、第５領域６２ｃ、６２ｃの傾斜角度Θ５、Θ５に比較して、大きくてもよいし、小さくてもよいし、同一であってもよい。 The eighth regions 63c and 63c may or may not be curved surfaces. Assuming that the inclination angles of the eighth regions 63c and 63c are Θ8 (not shown in the figure), the inclination angles Θ8 and Θ8 are compared with the inclination angles Θ5 and Θ5 of the fifth regions 62c and 62c. It may be large, small, or the same.
　第１領域６１ａ、第３領域６２ａ及び第６領域６３ａは、平面視において、角部５１の二等分線に沿って延びる直線Ｌ１上に位置する部位を有している。一方、第２領域６１ｂ、６１ｂ、第４領域６２ｂ、６２ｂ及び第７領域６３ｂ、６３ｂは、平面視において辺部５２、５２と直交する直線Ｌ２上に位置する部位を有している。 The first region 61a, the third region 62a, and the sixth region 63a have portions located on a straight line L1 extending along the bisector of the corner portion 51 in a plan view. On the other hand, the second regions 61b and 61b, the fourth regions 62b and 62b and the seventh regions 63b and 63b have portions located on the straight line L2 orthogonal to the side portions 52 and 52 in a plan view.
　第１領域６１ａ、第３領域６２ａ及び第６領域６３ａの上辺及び下辺は、例えば、それぞれ曲線状であってよい。第２領域６１ｂ、６１ｂ、第４～第５領域６２ｂ、６２ｂ、６２ｃ、６２ｃ及び第７～第８領域６３ｂ、６３ｂ、６３ｃ、６３ｃの上辺及び下辺は、例えば、それぞれ直線状であってよい。接続面５５は、切削部上面５０を構成する面のうち、最も上方に位置する面であってよい。 The upper side and the lower side of the first region 61a, the third region 62a, and the sixth region 63a may be curved, for example. The upper and lower sides of the second region 61b, 61b, the fourth to fifth regions 62b, 62b, 62c, 62c and the seventh to eighth regions 63b, 63b, 63c, 63c may be linear, for example. The connecting surface 55 may be the surface located at the uppermost position among the surfaces constituting the upper surface 50 of the cutting portion.
（下面）
　図２及び図３を参照する。繰り返しになるが、インサート１１の下面２２は、上面２１の反対側に位置している。下面２２は、インサート１１がホルダ７０（図２参照）に固定された状態においてホルダ７０側に臨む面である。インサート１１は、下面２２がホルダ７０に当接した状態で固定されてよい。下面２２の形状の説明については、上面２１の形状の説明を援用してよい。 (Bottom surface)
See FIGS. 2 and 3. Again, the lower surface 22 of the insert 11 is located on the opposite side of the upper surface 21. The lower surface 22 is a surface facing the holder 70 side when the insert 11 is fixed to the holder 70 (see FIG. 2). The insert 11 may be fixed with the lower surface 22 in contact with the holder 70. As for the description of the shape of the lower surface 22, the description of the shape of the upper surface 21 may be incorporated.
　図３及び図５Ａを参照する。図５Ａに示す例において、第１領域６１ａの下辺（下方の縁）から下面２２までの距離（鉛直方向の距離）をＤ１とした場合、距離Ｄ１は、第１領域６１ａの下辺に沿って一定であってよい。ここでいう一定は、例えば、第１領域６１ａの下辺に沿って、第１領域６１ａから下面２２までの距離を測った場合、上記の距離が０．０５ｍｍ以上変化しないこととされてよい。第１領域６１ａの下辺は、水平方向に沿って延びていてよい。 See FIGS. 3 and 5A. In the example shown in FIG. 5A, when the distance (distance in the vertical direction) from the lower side (lower edge) of the first region 61a to the lower surface 22 is D1, the distance D1 is constant along the lower side of the first region 61a. May be. The constant here may be that, for example, when the distance from the first region 61a to the lower surface 22 is measured along the lower side of the first region 61a, the above distance does not change by 0.05 mm or more. The lower edge of the first region 61a may extend along the horizontal direction.
　図５Ｂ及び図５Ｃを参照する。鉛直方向における、第２領域６１ｂ、６１ｂの下辺（下方の縁）から下面２２（図３参照）までの距離は、第１領域６１ａから離れるほど長くなっていてよい。図５Ｂに示すように、第１領域６１ａの近傍における、第２領域６１ｂ、６１ｂから下面２２までの距離をＤ２とする。図５Ｃに示すように、第１領域６１ａから離れた箇所における、第２領域６１ｂ、６１ｂから下面２２までの距離をＤ３とする。この時、両者の関係は、Ｄ２＜Ｄ３となっていてよい。即ち、第２領域６１ｂ、６１ｂの下辺（下方側の縁）は、第１領域６１ａから離れる方向において、上方に傾斜していてよい。第２領域６１ｂ、６１ｂの下辺は、第１領域６１ａから離れる方向において、上り勾配になっていてよい。 See FIGS. 5B and 5C. The distance from the lower side (lower edge) of the second regions 61b and 61b to the lower surface 22 (see FIG. 3) in the vertical direction may be longer as the distance from the first region 61a increases. As shown in FIG. 5B, the distance from the second regions 61b and 61b to the lower surface 22 in the vicinity of the first region 61a is defined as D2. As shown in FIG. 5C, the distance from the second regions 61b and 61b to the lower surface 22 at a location away from the first region 61a is defined as D3. At this time, the relationship between the two may be D2 <D3. That is, the lower sides (lower edges) of the second regions 61b and 61b may be inclined upward in the direction away from the first region 61a. The lower sides of the second regions 61b and 61b may have an upslope in the direction away from the first region 61a.
　第２領域６１ｂ、６１ｂの下辺の傾斜角度は、例えば、３度以下、１０度以下、２０度以下又は２０度以上とされてよい。第２領域６１ｂ、６１ｂの下辺は、第２領域６１ｂ、６１ｂと連結面５４との境界を構成している。 The inclination angles of the lower sides of the second regions 61b and 61b may be, for example, 3 degrees or less, 10 degrees or less, 20 degrees or less, or 20 degrees or more. The lower sides of the second regions 61b and 61b form a boundary between the second regions 61b and 61b and the connecting surface 54.
（側面）
　図３を参照する。側面２３は、上面２１及び下面２２の間に位置している。側面２３は、上面２１及び下面２２を繋ぐ面であってよい。側面２３は、外側に向かって膨出していてもよいし、内側に向かって窪んでいてもよいし、曲率を有しない面であってもよい。更に、側面２３は、全体が平滑な面であってもよいし、所々に凹凸を有する面であってもよい。 (side)
See FIG. The side surface 23 is located between the upper surface 21 and the lower surface 22. The side surface 23 may be a surface connecting the upper surface 21 and the lower surface 22. The side surface 23 may be bulged toward the outside, may be recessed toward the inside, or may be a surface having no curvature. Further, the side surface 23 may be a smooth surface as a whole, or may be a surface having irregularities in places.
　側面２３は、本体部側面３３と、切削部側面４３と、を有してよい。本体部側面３３は、本体部３０の側面の一部を構成している。一方、切削部側面４３は、切削部４０の側面の残部を構成している。切削部側面４３は、本体部側面３３と連続していてよい。 The side surface 23 may have a main body portion side surface 33 and a cutting portion side surface 43. The side surface 33 of the main body constitutes a part of the side surface of the main body 30. On the other hand, the side surface 43 of the cutting portion constitutes the rest of the side surface of the cutting portion 40. The side surface 43 of the cutting portion may be continuous with the side surface 33 of the main body portion.
　図４を併せて参照する。切削部側面４３は、刃部４１を構成する逃げ面４３ａを含んでいてよい。逃げ面４３ａは、すくい面５３に繋がり、被削材Ｏｂにインサート１１が必要以上に接触しないようすくい面５３に対し所定の角度で交差している。逃げ面４３ａ及びすくい面５３の境界には、切刃４１ａが位置している。即ち、切刃４１ａは、逃げ面４３ａ及びすくい面５３の稜線を含んでいる、といえる。 Refer to FIG. 4 as well. The side surface 43 of the cutting portion may include a flank surface 43a constituting the blade portion 41. The flank 43a is connected to the rake face 53 and intersects the rake face 53 at a predetermined angle so that the insert 11 does not come into contact with the work material Ob more than necessary. The cutting edge 41a is located at the boundary between the flank surface 43a and the rake surface 53. That is, it can be said that the cutting edge 41a includes the ridgeline of the flank surface 43a and the rake surface 53.
　次に、上記に説明した切削工具を構成するホルダについて説明する。インサートが固定されているホルダを見て、この説明をする。 Next, the holders that make up the cutting tool described above will be described. This is explained by looking at the holder to which the insert is fixed.
（ホルダ）
　図２を参照する。ホルダ７０は、例えば、先端７０ａ（第１端７０ａ）から後端７０ｂ（以下、第２端７０ｂとも呼ぶ。）に亘る長さを有してよい。図示の例のように、ホルダ７０は、棒形状を呈してよい。ホルダ７０の長さは、任意に設定できる。例えば、ホルダ７０の長さは、５０ｍｍ以上２００ｍｍ以下の範囲で設定されてよい。 (holder)
See FIG. The holder 70 may have, for example, a length extending from the front end 70a (first end 70a) to the rear end 70b (hereinafter, also referred to as the second end 70b). As shown in the illustrated example, the holder 70 may have a rod shape. The length of the holder 70 can be set arbitrarily. For example, the length of the holder 70 may be set in the range of 50 mm or more and 200 mm or less.
　ホルダ７０の大きさは、任意に設定できる。例えば、ホルダ７０の幅（左右方向）及び厚さ（上下方向）は、１０ｍｍ以上、１９ｍｍ以上、２５ｍｍ以上又は５０ｍｍ以上とされてよい。ホルダ７０の幅及び厚さは、互いに同一であってもよいし、互いに異なっていてもよい。ホルダ７０の厚さは、先端７０ａに向かって大きくなってよい。 The size of the holder 70 can be set arbitrarily. For example, the width (horizontal direction) and thickness (vertical direction) of the holder 70 may be 10 mm or more, 19 mm or more, 25 mm or more, or 50 mm or more. The width and thickness of the holders 70 may be the same or different from each other. The thickness of the holder 70 may increase toward the tip 70a.
　ホルダ７０の材料は、任意に設定できる。例えば、ホルダ７０の材料は、鋼又は鋳鉄等であってもよい。鋳鉄の場合、例えば、ホルダ７０の柔靭性を高めることができる。 The material of the holder 70 can be set arbitrarily. For example, the material of the holder 70 may be steel, cast iron, or the like. In the case of cast iron, for example, the toughness of the holder 70 can be increased.
　ホルダ７０は、シャンク部７１と、固定部７２と、を有してよい。シャンク部７１は、ホルダ７０の第２端７０ｂ側を構成している。シャンク部７１は、例えば、内部が満たされた中実であってよい。シャンク部７１の形状は、任意である。例えば、シャンク部７１が延びる方向に垂直な断面において、シャンク部７１は、矩形状又は円形状を呈してよい。図２に示すように、シャンク部７１は、第１面７１ａと、第２面７１ｂと、第３面７１ｃと、第４面７１ｄと、を有してよい。 The holder 70 may have a shank portion 71 and a fixing portion 72. The shank portion 71 constitutes the second end 70b side of the holder 70. The shank portion 71 may be, for example, a solid inside. The shape of the shank portion 71 is arbitrary. For example, in a cross section perpendicular to the direction in which the shank portion 71 extends, the shank portion 71 may have a rectangular or circular shape. As shown in FIG. 2, the shank portion 71 may have a first surface 71a, a second surface 71b, a third surface 71c, and a fourth surface 71d.
　第１面７１ａは、インサート１１の逃げ面４３ａが臨む方向側を向いていてよい。第２面７１ｂは、第１面７１ａの反対側に位置してよい。第３面７１ｃは、第１面７１ａ及び第２面７１ｂを繋ぐと共に、すくい面５３が臨む方向側を向いていてよい。第４面７１ｄは、第１面７１ａ及び第２面７１ｂを繋ぐと共に、第３面７１ｃの反対側に位置してよい。第１～第４面７１ｄは、第２端７０ｂと固定部７２とを繋ぐ、シャンク部７１の表面であってよい。 The first surface 71a may face the direction in which the flank 43a of the insert 11 faces. The second surface 71b may be located on the opposite side of the first surface 71a. The third surface 71c may connect the first surface 71a and the second surface 71b and face the direction in which the rake surface 53 faces. The fourth surface 71d may connect the first surface 71a and the second surface 71b and may be located on the opposite side of the third surface 71c. The first to fourth surfaces 71d may be the surface of the shank portion 71 that connects the second end 70b and the fixing portion 72.
　固定部７２は、ホルダ７０の第１端７０ａ側に位置している。固定部７２には、被削材Ｏｂを切削可能なインサート１１が固定されている。例えば、固定部７２の一部を欠いたポケット７２ａにインサート１１が嵌め込まれていてよい。インサート１１は、クランプ１３によって下方に付勢されることによって固定されてよい。更には、インサート１１にあけられた貫通穴１１ａには、ホルダ７０に向かってインサート１１を付勢するクランプ１３の先端が挿入されてよい。インサート１１は、ポケット７２ａの底面及びクランプ１３に挟まれ、ホルダ７０に固定されてよい。図２に示す例のように、クランプ１３は、ホルダ７０に螺合されたねじによって固定されてよい。固定部７２は、ホルダ７０の第１端７０ａ側を構成している。 The fixing portion 72 is located on the first end 70a side of the holder 70. An insert 11 capable of cutting the work material Ob is fixed to the fixing portion 72. For example, the insert 11 may be fitted in the pocket 72a lacking a part of the fixing portion 72. The insert 11 may be fixed by being urged downward by the clamp 13. Further, the tip of the clamp 13 for urging the insert 11 toward the holder 70 may be inserted into the through hole 11a formed in the insert 11. The insert 11 may be sandwiched between the bottom surface of the pocket 72a and the clamp 13 and fixed to the holder 70. As in the example shown in FIG. 2, the clamp 13 may be fixed by a screw screwed into the holder 70. The fixing portion 72 constitutes the first end 70a side of the holder 70.
　次に、切削工具を用いた被削材の切削方法について説明する。 Next, a method of cutting the work material using a cutting tool will be described.
　図１及び図７を参照する。図７には、被削材切削方法の各工程が示されている。被削材切削方法は、例えば、工作機械Ｍｔに被削材Ｏｂを取り付ける工程（被削材を固定する工程）から始めてよい。その後、例えば、工作機械Ｍｔ（例えば、刃物台）に切削工具１０を取り付けてよい（工具を固定する工程）。尚、被削材を固定する工程は、例えば、工具を固定する工程を終えた後に行ってもよい。 Refer to FIGS. 1 and 7. FIG. 7 shows each step of the work material cutting method. The work material cutting method may start from, for example, a step of attaching the work material Ob to the machine tool Mt (a step of fixing the work material). After that, for example, the cutting tool 10 may be attached to the machine tool Mt (for example, the tool post) (step of fixing the tool). The step of fixing the work material may be performed, for example, after the step of fixing the tool is completed.
　工作機械Ｍｔに対し被削材Ｏｂ及び切削工具１０が固定されたら、切削工具１０（インサート１１）の位置決めを行ってよい（位置決め工程）。例えば、被削材Ｏｂの大きさ及び／又は形状を確認すると共に、被削材Ｏｂと切削工具１０との位置関係を確認してよい。位置決め工程は、手動（目視）又は自動によって行ってよい。次に、工作機械Ｍｔを介して被削材Ｏｂを回転させる（回転工程）。被削材Ｏｂが回転している状態において、工作機械Ｍｔを介して切削工具１０を被削材Ｏｂに接触させてよい（切削工程）。具体的には、インサート１１の切削部４０を被削材Ｏｂに接触させてよい。そして、被削材Ｏｂが所望の大きさ及び形状になるまで切削する。 After the work material Ob and the cutting tool 10 are fixed to the machine tool Mt, the cutting tool 10 (insert 11) may be positioned (positioning step). For example, the size and / or shape of the work material Ob may be confirmed, and the positional relationship between the work material Ob and the cutting tool 10 may be confirmed. The positioning step may be performed manually (visually) or automatically. Next, the work material Ob is rotated via the machine tool Mt (rotation process). While the work material Ob is rotating, the cutting tool 10 may be brought into contact with the work material Ob via the machine tool Mt (cutting process). Specifically, the cutting portion 40 of the insert 11 may be brought into contact with the work material Ob. Then, the work material Ob is cut until it has a desired size and shape.
　被削材Ｏｂが所望の大きさ及び形状になったら、切削工具１０を被削材Ｏｂから離してよい（切削工具を離す工程）。その後、被削材Ｏｂの回転を停止させ（停止工程）、工作機械Ｍｔから被削材Ｏｂを取り外す（被削材取り外し工程）。これにより、切削された被削材Ｏｂを得ることができる。 When the work material Ob has a desired size and shape, the cutting tool 10 may be separated from the work material Ob (step of releasing the cutting tool). After that, the rotation of the work material Ob is stopped (stop process), and the work material Ob is removed from the machine tool Mt (work material removal process). Thereby, the cut work material Ob can be obtained.
　次に、本開示におけるインサートの作用について説明する。 Next, the operation of the insert in the present disclosure will be described.
　図８Ａ～図８Ｃを参照する。これらの図には、被削材Ｏｂに対し刃部４１が接触し、これにより被削材Ｏｂが切削される図が示されている。例えば、被削材Ｏｂがインサート１１に切削されることによって、切削された部位は、切りくずＤｕとなる。被削材Ｏｂに対するインサート１１の切り込みが小さい場合、概ねインサート１１の角部５１の周辺のみで切削され、被削材Ｏｂからは幅が小さい切りくずＤｕが発生する。一方、被削材Ｏｂに対するインサート１１の切り込みが大きい場合、角部５１及び辺部５２、５２によって切削され、被削材Ｏｂからは幅が大きい切りくずＤｕが発生する。 Refer to FIGS. 8A-8C. In these figures, the blade portion 41 comes into contact with the work material Ob, and the work material Ob is cut by this. For example, when the work material Ob is cut into the insert 11, the cut portion becomes chip Du. When the notch of the insert 11 with respect to the work material Ob is small, the cutting is performed only around the corner portion 51 of the insert 11, and a small chip Du is generated from the work material Ob. On the other hand, when the cut of the insert 11 with respect to the work material Ob is large, the cutting is performed by the corner portions 51 and the side portions 52 and 52, and a large chip Du is generated from the work material Ob.
　図８Ａを参照する。図８Ａには、インサート１１の角部５１の一部のみで被削材Ｏｂが切削され、これにより幅が小さな切りくずＤｕが発生している図が示されている。切削により発生した幅が小さな切りくずＤｕは、例えば、すくい面５３を介して、角部５１に沿った第１領域６１ａと、辺部５２、５２に沿った第２領域６１ｂ、６１ｂとの境界Ｂｏ０の付近に向かって進む。ここで、第１領域６１ａの傾斜角度は、第２領域６１ｂ、６１ｂの傾斜角度よりも大きい。これにより、切削時において、被削材Ｏｂの切削により発生した切りくずＤｕが第１領域６１ａに接触し易くなる。結果、切削時において、切りくずＤｕの速度をより確実に低下させることができる。 Refer to FIG. 8A. FIG. 8A shows a diagram in which the work material Ob is cut only at a part of the corner portion 51 of the insert 11, and as a result, chip Du having a small width is generated. The chip Du having a small width generated by cutting is, for example, the boundary between the first region 61a along the corner portion 51 and the second regions 61b and 61b along the side portions 52 and 52 via the rake face 53. Proceed toward the vicinity of Bo0. Here, the inclination angle of the first region 61a is larger than the inclination angle of the second regions 61b and 61b. As a result, during cutting, the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a. As a result, the speed of chip Du can be reduced more reliably during cutting.
　図８Ｂを参照する。図８Ｂには、インサート１１の角部５１における広い範囲で被削材Ｏｂが切削され、これにより幅が小さな切りくずＤｕが発生している図が示されている。切削により発生した幅が小さな切りくずＤｕは、例えば、すくい面５３を介して、角部５１に沿った第１領域６１ａに向かって進む。ここで、第１領域６１ａの傾斜角度は、第２領域６１ｂ、６１ｂの傾斜角度よりも大きい。これにより、切削時において、被削材Ｏｂの切削により発生した切りくずＤｕが第１領域６１ａに接触し易くなる。結果、切削時において、切りくずＤｕの速度をより確実に低下させることができる。 Refer to FIG. 8B. FIG. 8B shows a diagram in which the work material Ob is cut in a wide range at the corner portion 51 of the insert 11 to generate chips Du having a small width. The small-width chip Du generated by cutting advances toward the first region 61a along the corner portion 51, for example, through the rake face 53. Here, the inclination angle of the first region 61a is larger than the inclination angle of the second regions 61b and 61b. As a result, during cutting, the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a. As a result, the speed of chip Du can be reduced more reliably during cutting.
　図８Ｃを参照する。図８Ｃには、インサート１１の角部５１及び辺部５２、５２の周辺で被削材Ｏｂが切削され、これにより幅が大きな切りくずＤｕが発生している図が示されている。切削により発生した幅が大きな切りくずＤｕは、例えば、すくい面５３を介して、角部５１に沿った第１領域６１ａ、及び、辺部５２、５２に沿った第２領域６１ｂ、６１ｂに向かって進む。ここで、第２領域６１ｂ、６１ｂの傾斜角度は、第１領域６１ａの傾斜角度より小さい。これにより、切削時において、被削材Ｏｂの切削により発生した切りくずＤｕが第２領域６１ｂに接触し難くなる。結果、第１領域６１ａ及び第２領域６１ｂ、６１ｂに向かった切りくずＤｕを、第２領域６１ｂ、６１ｂを介してインサート１１の外部に導くことができる。これにより、太い切りくずＤｕの速度の低下が軽減される。 Refer to FIG. 8C. FIG. 8C shows a diagram in which the work material Ob is cut around the corner portion 51 and the side portions 52, 52 of the insert 11, thereby generating chips Du having a large width. The large-width chip Du generated by cutting is directed to the first region 61a along the corner portion 51 and the second regions 61b and 61b along the side portions 52 and 52, for example, via the rake face 53. Proceed. Here, the inclination angles of the second regions 61b and 61b are smaller than the inclination angles of the first regions 61a. This makes it difficult for the chip Du generated by cutting the work material Ob to come into contact with the second region 61b during cutting. As a result, the chip Du toward the first region 61a and the second regions 61b, 61b can be guided to the outside of the insert 11 via the second regions 61b, 61b. As a result, the decrease in the speed of the thick chip Du is reduced.
　図５Ａ～図５Ｄ及び図８Ａ～図８Ｃを参照する。例えば、被削材Ｏｂがインサート１１の角部５１のみの周辺で切削されると、被削材Ｏｂから生じる切りくずＤｕは、幅が小さくなる。例えば、幅が小さな切りくずＤｕ（細い切りくずＤｕ）は、進む方向が不安定であり、時として所定の速度を有しつつ被削材Ｏｂに向かうこともある。ここで、本開示において、第１領域６１ａの傾斜角度Θ１は、第２領域６１ｂ、６１ｂの傾斜角度Θ２、Θ２より大きい。傾斜角度Θ１が傾斜角度Θ２、Θ２より大きいことにより、切削時において、被削材Ｏｂの切削により発生した切りくずＤｕは、第１領域６１ａに接触し易くなる。これにより、細い切りくずＤｕを第１領域６１ａに接触させ、その速度を低下させることができる。 Refer to FIGS. 5A-5D and 8A-8C. For example, when the work material Ob is cut around only the corner portion 51 of the insert 11, the chip Du generated from the work material Ob becomes smaller in width. For example, a chip Du (thin chip Du) having a small width is unstable in the traveling direction, and sometimes heads toward the work material Ob while having a predetermined speed. Here, in the present disclosure, the inclination angle Θ1 of the first region 61a is larger than the inclination angles Θ2 and Θ2 of the second regions 61b and 61b. Since the inclination angle Θ1 is larger than the inclination angles Θ2 and Θ2, the chip Du generated by cutting the work material Ob is likely to come into contact with the first region 61a during cutting. As a result, the thin chip Du can be brought into contact with the first region 61a and its speed can be reduced.
　一方、被削材Ｏｂがインサート１１の角部５１及び辺部５２、５２の周辺で切削されると、被削材Ｏｂから生じる切りくずＤｕは、幅が大きくなる。例えば、幅の大きな切りくずＤｕ（太い切りくずＤｕ）は、進む方向が安定しているものの、インサート１１上に留まり易い。ここで、本開示において、第２すくい面５３ｂは、平面視において、第１すくい面５３ａから離れるほど幅が小さくなっている。これにより、太い切りくずＤｕは、第２領域６１ｂ側に移動し易くなる。加えて、第２領域６１ｂの傾斜角度Θ２、Θ２は、第１領域６１ａの傾斜角度Θ１より小さい。結果、第２領域６１ｂ側に移動した太い切りくずＤｕの速度が低下する虞を軽減できる。 On the other hand, when the work material Ob is cut around the corners 51 and the sides 52, 52 of the insert 11, the chip Du generated from the work material Ob becomes large in width. For example, a wide chip Du (thick chip Du) tends to stay on the insert 11 although the traveling direction is stable. Here, in the present disclosure, the width of the second rake face 53b becomes smaller as the distance from the first rake face 53a increases in a plan view. This makes it easier for the thick chip Du to move to the second region 61b side. In addition, the tilt angles Θ2 and Θ2 of the second region 61b are smaller than the tilt angles Θ1 of the first region 61a. As a result, it is possible to reduce the possibility that the speed of the thick chip Du that has moved to the second region 61b side decreases.
　本開示のインサート１１によれば、切りくずＤｕが細い場合には速度を低下させ、切りくずＤｕが太い場合には速度が低下することを軽減できる。即ち、切りくずＤｕが被削材Ｏｂに向かう虞、及び、切りくずＤｕがインサート１１上に留まる虞をそれぞれ軽減できる。よって、安定した切削が可能なインサート１１の提供ができる。 According to the insert 11 of the present disclosure, when the chip Du is thin, the speed is reduced, and when the chip Du is thick, the speed reduction can be reduced. That is, it is possible to reduce the risk of the chip Du heading toward the work material Ob and the risk of the chip Du staying on the insert 11. Therefore, it is possible to provide the insert 11 capable of stable cutting.
　図６を参照する。第１すくい面５３ａの幅は、角部５１に沿って一定である。第１すくい面５３ａの幅が角部５１に沿って一定であることにより、第１すくい面５３ａの周辺で切削され生じた切りくずＤｕは、安定して第１領域６１ａに向かうことができる。即ち、第１すくい面５３ａの周辺で切削された細い切りくずＤｕ（図８Ａ及び図８Ｂ参照）を、より確実に第１領域６１ａに接触させることができる。結果、より安定した切削が可能なインサート１１の提供ができる。 Refer to FIG. The width of the first rake face 53a is constant along the corner portion 51. Since the width of the first rake face 53a is constant along the corner portion 51, the chip Du generated by cutting around the first rake face 53a can stably head toward the first region 61a. That is, the thin chip Du (see FIGS. 8A and 8B) cut around the first rake face 53a can be more reliably brought into contact with the first region 61a. As a result, it is possible to provide the insert 11 capable of more stable cutting.
　図５Ｂ及び図５Ｃを併せて参照する。第２領域６１ｂは、平面視において辺部５２、５２に直交する方向の幅が第１領域６１ａから離れるほど小さくなっている。これにより、切りくずＤｕの幅が大きくなるほど、切りくずＤｕが勢いよく第２領域６１ｂに接触する虞が軽減される。結果、より安定した切削が可能なインサート１１の提供ができる。 Refer to FIG. 5B and FIG. 5C together. The width of the second region 61b in the direction orthogonal to the side portions 52, 52 in a plan view becomes smaller as the width becomes farther from the first region 61a. As a result, as the width of the chip Du increases, the possibility that the chip Du vigorously contacts the second region 61b is reduced. As a result, it is possible to provide the insert 11 capable of more stable cutting.
　図５Ａ及び図６を参照する。第１領域６１ａは、平面視において角部５１に直交する方向の幅が角部５１に沿って一定である。これにより、切削により発生し第１領域６１ａに接触した細い切りくずＤｕの移動方向を安定させることができる。結果、より安定した切削が可能なインサート１１の提供ができる。 Refer to FIGS. 5A and 6. The width of the first region 61a in the direction orthogonal to the corner portion 51 in a plan view is constant along the corner portion 51. As a result, the moving direction of the thin chips Du generated by cutting and in contact with the first region 61a can be stabilized. As a result, it is possible to provide the insert 11 capable of more stable cutting.
　図４、図５Ｂ及び図５Ｃを参照する。第２領域６１ｂの下方側の縁は、第１領域６１ａから離れるほど上方に向かっている。これにより、太い切りくずＤｕは、第２領域６１ｂに沿って上方に向かうことができる。結果、太い切りくずＤｕがインサート１１上に留まる虞が軽減される。よって、より安定した切削が可能なインサート１１の提供ができる。 Refer to FIGS. 4, 5B and 5C. The lower edge of the second region 61b points upward as the distance from the first region 61a increases. This allows the thick chip Du to move upward along the second region 61b. As a result, the risk of thick chip Du staying on the insert 11 is reduced. Therefore, it is possible to provide the insert 11 capable of more stable cutting.
　第２領域６１ｂは、第１すくい面５３ａに沿う部位を有している。これにより、第１領域６１ａに接触した切りくずＤｕは、第２領域６１ｂに沿って移動し易くなる。結果、インサート１１上に切りくずＤｕが留まる虞を軽減できる。よって、より安定した切削が可能なインサート１１の提供ができる。 The second region 61b has a portion along the first rake face 53a. This facilitates the chip Du in contact with the first region 61a to move along the second region 61b. As a result, the risk of chip Du staying on the insert 11 can be reduced. Therefore, it is possible to provide the insert 11 capable of more stable cutting.
　図２を参照する。切削工具１０は、第１端７０ａ側に固定されたインサート１１を有している。これにより、安定して被削材Ｏｂを切削可能な切削工具１０の提供ができる。 Refer to Fig. 2. The cutting tool 10 has an insert 11 fixed to the first end 70a side. As a result, it is possible to provide a cutting tool 10 capable of stably cutting the work material Ob.
　図１及び図７を参照する。本開示における被削材切削方法は、被削材Ｏｂに対し切削工具１０を接触させ、被削材Ｏｂを切削する工程を含んでいる。更に、切削工具１０は、上記インサート１１を含んでいる。よって、より安定した切削が可能な被削材切削方法の提供ができる。 Refer to FIGS. 1 and 7. The work material cutting method in the present disclosure includes a step of bringing the cutting tool 10 into contact with the work material Ob and cutting the work material Ob. Further, the cutting tool 10 includes the insert 11. Therefore, it is possible to provide a work material cutting method capable of more stable cutting.
［変形例］
　図９を参照する。図９には、変形例におけるインサート１１Ａの断面図が示されている。図９は、上記図５Ａに対応している。実施形態に示されたインサート１１と共通する部分については、符号を流用すると共に詳細な説明を省略する。 [Modification example]
See FIG. FIG. 9 shows a cross-sectional view of the insert 11A in the modified example. FIG. 9 corresponds to FIG. 5A. For the parts common to the insert 11 shown in the embodiment, reference numerals are used and detailed description thereof will be omitted.
（切削部上面）
　切削部上面５０Ａは、角部５１と、辺部５２、５２と、すくい面５３と、立ち上がり面６０Ａと、を有してよい。第１立ち上がり面６１Ａは、すくい面５３の下辺に繋がっている。第１立ち上がり面６１Ａは、すくい面５３から第２立ち上がり面６２に向かう方向において、上方に傾斜している。 (Upper surface of cutting part)
The upper surface 50A of the cutting portion may have a corner portion 51, side portions 52 and 52, a rake surface 53, and a rising surface 60A. The first rising surface 61A is connected to the lower side of the rake surface 53. The first rising surface 61A is inclined upward in the direction from the rake face 53 to the second rising surface 62.
　第１領域６１Ａａは、角部５１に沿うすくい面５３の下辺に繋がってもよい。図９に示すように、すくい面５３及び第１領域６１Ａａによって構成される溝は、角部５１を二等分する断面視において、略Ｖ字形状（略Ｕ字形状を含む）を呈してもよい。即ち、立ち上がり面６０（第１立ち上がり面６１）は、すくい面５３のみを介して切刃４１ａから離れていてもよい。 The first region 61Aa may be connected to the lower side of the rake face 53 along the corner portion 51. As shown in FIG. 9, the groove formed by the rake face 53 and the first region 61Aa may exhibit a substantially V shape (including a substantially U shape) in a cross-sectional view that bisects the corner portion 51. Good. That is, the rising surface 60 (first rising surface 61) may be separated from the cutting edge 41a only through the rake face 53.
　第１領域６１Ａａの下辺（下方の縁）は、すくい面５３と繋がっていてもよい。別の観点では、第１領域６１Ａａの下辺は、第１領域６１Ａａとすくい面５３との境界を構成していてもよい。第２領域６１Ａｂの下辺（下方の縁）は、すくい面５３と繋がっていてもよい。別の観点では、第２領域６１Ａｂの下辺は、第２領域６１Ａｂとすくい面５３との境界を構成していてもよい。 The lower edge (lower edge) of the first region 61Aa may be connected to the rake face 53. From another viewpoint, the lower side of the first region 61Aa may form a boundary between the first region 61Aa and the rake face 53. The lower edge (lower edge) of the second region 61Ab may be connected to the rake face 53. From another viewpoint, the lower side of the second region 61Ab may form a boundary between the second region 61Ab and the rake face 53.
　本開示におけるインサート及び切削工具は、上記に述べた実施形態及び変形例に限定されない。以下、形態が変形されたインサート及び切削工具の例を幾つか紹介する。 The inserts and cutting tools in the present disclosure are not limited to the embodiments and modifications described above. The following are some examples of inserts and cutting tools with deformed shapes.
　例えば、実施形態では、立ち上がり面は、第１～第３立ち上がり面によって構成された。しかしながら、本開示のインサートにおいては、例えば、必要に応じて第３立ち上がり面を廃してもよい。即ち、第２立ち上がり面が接続面に直接繋がっていてもよい。例えば、第３領域が接続面における角部に沿った部位に繋がっていてもよく、第４領域が接続面における辺部に沿った部位に繋がっていてもよい。 For example, in the embodiment, the rising surface is composed of the first to third rising surfaces. However, in the inserts of the present disclosure, for example, the third rising surface may be omitted if necessary. That is, the second rising surface may be directly connected to the connecting surface. For example, the third region may be connected to a portion along the corner portion of the connecting surface, or the fourth region may be connected to a portion along the side portion of the connecting surface.
　例えば、実施形態では、図示された切削工具が右勝手になっている。しかしながら、本開示における切削工具は、右勝手に限定されず、左勝手にも適用可能である。更には、本開示における切削工具は、勝手なしにも適用可能である。 For example, in the embodiment, the illustrated cutting tool is right-handed. However, the cutting tool in the present disclosure is not limited to right-handed cutting tools, and can also be applied to left-handed cutting tools. Furthermore, the cutting tool in the present disclosure can be applied without permission.
　１０…切削工具
　１１…インサート
　２１、２１Ａ…上面
　２２…下面
　２３…側面
　４１ａ…切刃
　５１…角部
　５２…辺部
　５３…すくい面
　６０、６０Ａ…立ち上がり面
　６１ａ、６１Ａａ…第１領域
　６１ｂ、６１Ａｂ…第２領域
　７０…ホルダ
　７０ａ…第１端
　７０ｂ…第２端
　Ｍｔ…工作機械
　Ｏｂ…被削材
　Ｌ１…直線
　Ｌ２…直線 10 ... Cutting tool 11 ... Insert 21, 21A ... Top surface 22 ... Bottom surface 23 ... Side surface 41a ... Cutting edge 51 ... Corner 52 ... Side 53 ... Scooping surface 60, 60A ... Rising surface 61a, 61Aa ... First area 61b, 61Ab ... Second area 70 ... Holder 70a ... First end 70b ... Second end Mt ... Machine tool Ob ... Work material L1 ... Straight line L2 ... Straight line

Claims (8)

  1. 　上面と、前記上面の反対側に位置する下面と、前記上面及び前記下面を繋ぐ側面と、前記側面及び前記上面の境界に位置する切刃と、を有し、
    　前記上面は、
    　　前記側面との境界に位置し、平面視において外方に向かって膨らんだ凸曲線状を呈する角部と、
    　　前記角部に繋がり、前記角部と共に前記切刃を構成している辺部と、
    　　前記辺部及び前記角部に沿って延びていると共に、前記辺部及び前記角部から離れるほど下方に向かうすくい面と、
    　　前記すくい面を介して前記切刃から離れた立ち上がり面と、
    　を有し、
    　前記すくい面は、
    　　前記角部に沿った第１すくい面と、
    　　前記辺部に沿った第２すくい面と、
    　を有し、
    　前記立ち上がり面は、
    　　前記角部を二等分する直線上に位置する第１領域と、
    　　前記第１領域に繋がり、少なくとも一部が前記第２すくい面に沿っている第２領域と、
    　を有し、
    　前記第２すくい面は、平面視において、前記第１すくい面から離れるほど幅が小さくなり、
    　前記第１領域及び前記第２領域は、それぞれ前記すくい面から離れるほど上方に向かう傾斜角度を有し、
    　前記第１領域の傾斜角度は、前記第２領域の傾斜角度より大きい
    　切削インサート。     It has an upper surface, a lower surface located on the opposite side of the upper surface, a side surface connecting the upper surface and the lower surface, and a cutting edge located at the boundary between the side surface and the upper surface.
    The upper surface is
    A corner portion located at the boundary with the side surface and exhibiting a convex curve shape bulging outward in a plan view,
    A side portion connected to the corner portion and forming the cutting edge together with the corner portion,
    A rake face that extends along the sides and corners and that goes downward as the distance from the sides and corners increases.
    A rising surface separated from the cutting edge through the rake surface,
    Have,
    The rake face is
    The first rake face along the corner and
    The second rake face along the side and
    Have,
    The rising surface is
    A first region located on a straight line that bisects the corner,
    A second region connected to the first region and at least partly along the second rake face,
    Have,
    The width of the second rake face becomes smaller as the distance from the first rake face increases in a plan view.
    The first region and the second region each have an inclination angle that goes upward as the distance from the rake face increases.
    A cutting insert in which the tilt angle of the first region is larger than the tilt angle of the second region.
  2. 　前記第１すくい面の幅は、前記角部に沿って一定である
    　　請求項１記載の切削インサート。     The cutting insert according to claim 1, wherein the width of the first rake face is constant along the corner portion.
  3. 　前記第２領域は、平面視において前記辺部に直交する方向の幅が前記第１領域から離れるほど小さくなっている
    　請求項１又は２記載の切削インサート。     The cutting insert according to claim 1 or 2, wherein the width of the second region in a direction orthogonal to the side portion in a plan view becomes smaller as the width becomes smaller as the distance from the first region increases.
  4. 　前記第１領域は、平面視において前記角部に直交する方向の幅が一定である
    　請求項１～３のいずれか１項記載の切削インサート。     The cutting insert according to any one of claims 1 to 3, wherein the first region has a constant width in a direction orthogonal to the corner portion in a plan view.
  5. 　前記第２領域の下方側の縁は、前記第１領域から離れるほど上方に向かっている
    　請求項１～４のいずれか１項記載の切削インサート。     The cutting insert according to any one of claims 1 to 4, wherein the lower edge of the second region is directed upward as the distance from the first region increases.
  6. 　前記第２領域は、前記第１すくい面に沿う部位を有している
    　請求項１～５のいずれか１項記載の切削インサート。     The cutting insert according to any one of claims 1 to 5, wherein the second region has a portion along the first rake face.
  7. 　第１端から第２端に向かって延びたホルダと、
    　前記第１端側に固定された、請求項１～６のいずれか１項記載の切削インサートと、
    　を有する
    　切削工具。     A holder extending from the first end to the second end,
    The cutting insert according to any one of claims 1 to 6, which is fixed to the first end side.
    Cutting tools with.
  8. 　被削材を回転させる工程と、
    　回転している前記被削材に対し請求項７記載の切削工具を接触させ、前記被削材を切削する工程と、
    　切削された前記被削材から前記切削工具を離す工程と、
    　を有している
    　被削材の切削方法。     The process of rotating the work material and
    A step of bringing the cutting tool according to claim 7 into contact with the rotating work material to cut the work material, and
    The process of separating the cutting tool from the cut work material and
    How to cut the work material.
PCT/JP2020/046299 2019-12-11 2020-12-11 Insert, cutting tool, and method for cutting workpiece using said cutting tool WO2021117873A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0852604A (en) * 1994-08-09 1996-02-27 Valenite Inc Insert for cutting
JP2008207312A (en) * 2007-01-29 2008-09-11 Mitsubishi Materials Corp Cutting insert
WO2014192798A1 (en) * 2013-05-28 2014-12-04 京セラ株式会社 Cutting insert and cutting tool, and method for producing cut workpieces using cutting tool

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0852604A (en) * 1994-08-09 1996-02-27 Valenite Inc Insert for cutting
JP2008207312A (en) * 2007-01-29 2008-09-11 Mitsubishi Materials Corp Cutting insert
WO2014192798A1 (en) * 2013-05-28 2014-12-04 京セラ株式会社 Cutting insert and cutting tool, and method for producing cut workpieces using cutting tool

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JPWO2021117873A1 (en) 2021-06-17

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